stage 2 good idea.
and bear in mind i don't think Gamefreak think too much about the meta (from what i've been hearing of in my lil' battle-noob bubble)
I think they think about making MORE pokemon to catch! = $$$
and with these Eeeveelutions there is a chance to re-invent a stable brand (Eevee) with a lot of creativity. I mean, come on, how many derp pokemon are there? Gief prety eevees.
New sexy eevees would be one highlight of nintendo keeping my custom.