It's one of my favourite songs and a reason I rewatch those scenes with it.
This whole thing of music is confusing to me in recent times.
There was a time I wanted everthing like the japanese version but after seeing other shows go this direction, Season 14 at least try to do that and even the loss of the italien theme songs (which were something I use to put over the english and japanese version) due to TPCI making everything like the english version. I honestly do not want to see that loss.
Maybe it's nostalgia talking but there's some magic that comes out of visiting different versions of the show.
At the moment I can watch and import from Japan and english countries and get different experiences.
I chose japanese if I want to experience a different culture. I chose english if I want something mroe towards what I can relate too.
I can't really say I dislike either so I can't say whether it's better to keep or change. It really depends if the children enjoy the style of music or not in the long run.
Personally I'm not against changes aslong as the story stays intact. So if I ever get to my dream of making a cartoon I actually don't actually mind if another country changes my works to match their culture aslong as it's good and keeps to the story. I have read of japanese companies who have felt the same way so this is not unheard of.
I don't know what the japanese company of Pokemon thinks about the changes. I mean if it really is a bad thing then I would suspect they'd crack down on TPCI eventually like many other japanese companies have done to dub companies. Only a matter of time if they truely care about the changes.