The way to balance the Dragon type is really just not adding like a dozen Dragon-type (pseudo)legendaries. (And add other-typed ones to counter the ones that already are there)
Haxorus, Druddigon, Altaria, and Flygon aren't broken.
Kingdra and Salamence surely are good, but I don't think in a ridiculously overpowered way either. Kingdra needs a Rain team to work, and Salamence arguably is the weakest of all pseudo-legendaries.
The rest are pokémon that by design are powerful... and happen to have the Dragon type. Really, the type has the highest average stats because the mayority have over 600 BST.
Thankfully it seems this trend is getting broken, as neither Xerneas nor Yveltal look like dragon types at first glance. Not saying neither can be, but they certainly look like many other types above that.
While I'm guessing Sylveon is Normal, a Pokémon of that kind (not super-strong, just an average pokémon) could be a Dragon type and it wouldn't be broken in any way.
Why do they let you reply to your own post? If they can change it to add a button (Edit Post) they can delete two or three (Reply, Reply With Quote, weird button in corner).
We are getting onto offtopic imo and I suggest we stop, but if you also want to hear my 2 cents then here:
Do we need a new type to counter that? Considering all the work it would take, I say no. Do we need those things to be fixed? Yeah would be nice.
For your second statement (Fennekin counts as one topic) NO. There's a ton of strong Dragon-type powerhouses you can go to. We could fit in one evolutionary line, but that's it.
For your third statement, YES, YES, YES. There's even a whole topic on this, if you would like to discuss later. See ya!
There are other ways they could bring the dragons down a notch like making hydro pump, hurricane, leafblade, and oter moves TMs with good coverage since that makes other types equally versatile. This is all really just conjecture at this point, because GF could have no intentions of toning down the pseudolegendary Dragons, i just think that there might be a new type to oppose dragons and sylveon might just be one
I believe a lot of the reasons many get irritated with dragons is that they are a teeeeny bit overpowered. If we had one - just one - where you actually had to put in some work and strategy to make it an awesome pokemon, and not just fall back on what GF bless it with, that'd be really cool.
That's pretty much what Druddigon is, isn't it...and personally, one of the reasons I like him.
Altaria isn't really strong either...
I highly doubt we'll be getting 2 Eeveelutions this gen anyway, IIRC all of the other post-Gen I Eeveelutions have been released in their pair. For what it's worth, my money is on Sylveon being a new type. I can't see them creating a normal-type evolution that looks so drastically different from Eevee, and while it does look quite a lot like other normal types, I wouldn't be surprised if some of those were retyped. For those that think it's flying type, I don't think that GF have departed so far from the 'Flying types are birds' mantra that would warrant a Flying-type Eeveelution looking so abstract. Sure, a Sylph is an air spirit, but a Nymph is not. they are typically more associated with nature, so my bet is more on the mythological side of a Sylph, rather than the air side. We're probably all wrong and it's a dual-typed Bug/Rock 'mon that can fly by firing rainbows from its feet. Who knows, I'm sure we'll find out soon enough.
-Why do we need a supper effective counterpart for Sylveon can it not be like on its own. It looks drastically more awesome design than eevee (aka the right way to go for a normal eeveelution). For the imput about flying I honestly hope so since Sylveon type flying imo would degrade type flying as a concept.
-I like ghost/dark/ice types in general btw. Dragon is supposed to be overpowered and if you want to make the effort of importing all your dragons from other games for such a team, it reflects on yourself as a trainer. That you will pay for in the training since lots of dragon pokemon is weak until the point of final evolution, or for moves that is desired. Having a pure team posses its challenges in the training of them (I want a supper team of one of my fav'd types one day).
I'm assuming the second part was in referencing the Dragon type. I'm guessing you either are not particularly fond of that type, or you think we have enough Dragon Pokemon. I love Dragon types though and we receive Dragons every generation, so I am hoping a lot of the ones we get, I'll really love.
I am glad you also hope we'll be seeing character customisation this generation. Many fans really do, and since we've went to the sprite characters to full 3D character models, now would be the perfect time to introduce character customisation.
I believe a lot of people think Dragon types are way more overpowered than what they actually are. If you consider all these points I've made, then they really aren't that over powered. Dragons have their strengths and advantages, but they also have quite a few weaknesses and disadvantages to balance them out pretty well.
On a final note, I believe most Pseudo-legendary Pokemon are Dragon Pokemon because one of the requirements for Pseudo legendaries are a base total stat of 600. Dragon Pokemon get these high stats easily because, like I said, they are only super effective against themselves. They need high stats to make up for their lack of super effective capabilities. Being only super effective against themselves is a very big disadvantage, and that is why many Dragon Pokemon receive high stats, and why many Pseudo legendary Pokemon are Dragons. Giving a base total stat of 600 to any other type would make that Pokemon much more over powered than any Dragon.
I personally believe it's simply a Flying type. Lack of wings has never meant not Flying type:
Dodou and Dodrio have no visible wings and there's be (excluding one entry I think) no talk of them having any.
Gyarados, it's has no wings and is not really 'mystical' more 'you don't wanna make me mad'. It just sort of floats, but nothing visibly is keeping it in the air.
Hoppip, Skiploom, and Jumpluff float in the wind but once again no wings.
Mantyke, Mantine have fins not wings. There is a difference.
Drifloon, Drifblim are balloons so no wings. But I suppose I should exclude this one since it is excusable, though still referencing.
Rotom (fan-mode) because fans are not really able to fly.
Shaymin (Sky Forme) I'm sure has been CONSTANTLY brought up.
And Tornadus, who has no wings or any visible legs. Cloud does kinda make an expection here too, though.
So there are Pokemon with no wings, so this little Eeveelution could be too. I'm sure that they'll have some explaination for why Flying - if it is Flying - and why no wings. And some will complain, some will go "Oh, that makes sense". And even if there is no given reason...Gyarados just floats and no one says a thing about that so, I'll be a non-issue after a while. Or a butthurt issue to others, but different opinions and such.
But all of that aside, I don't see any fan-thought-of type having real evidence, so I definately can't side with new type all together. Call me a realist I suppose, but I want evidence before I support something.