You know, I almost jumped back into the mini-debate going on about
M Aggron-EX but then I realized it is mostly about differences in definition and card analysis and I'd just be repeating myself. None of us wants me to repeat myself. XD
Anime and TCG are well separated... and, as you can see from the artwork, it's like they are 2 parallel dimensions.
"Flavor" issues are a concern; after all the main reason this is the Pokémon TCG is because people are here for the Pokémon first and foremost; plenty of other popular and well-supported TCGs out there otherwise.
As Stadium cards do not have to be literal Stadiums but are merely locations where battles are taking place then yes it is quite possible for a field to offer different bonuses to the different sides of a conflict. The
problem is that the TCG isn't really geared for that level of detail; the idea that Stadiums apply the same blanket effect to both players where the only differences are those specific to who played the card is well entrenched. If you are someone critical over the current state/direction of the game, trying a new mechanic that
specifically upsets some of the existing balance is unwelcome at least at this time.
Now with all that being said, I don't know if I am particularly worried about this card and if I am, it will purely be because it provides a damage boost where I don't think one is needed. Now it might not be needed because like the damage being soaked it might not make any difference* or because it unfortunately it might actually make a real difference if there are enough borderline cases.
*Damage is funny that way; for most cards it only matters at the point something goes from "Not KOed" to "KOed".