>>52888525only if your early game teambuilding freedom doesn't kneecap mid to lategame monster acquisition in order to have more options earlier on just for the sake of it
one fear i'd definitely have from a giga diverse early mon pool is the possibility that players' teams may end up tending to have the same 3-5 decent pokemon in them because they were served up on a silver platter right at the beginning of the game.
pokemon's first generation is a master class in avoiding this, given that if you leaned into longer term "teambuilding" from the beginning, your team would consist of 1-2 birds, 1-2 rabbits, 1-2 bugs, and a rat. believe it or not, sometimes fewer options can be better.