well, i agree that is so sad to spend many millions on reroll and got trash ivs after reroll many times. On my opinión, reroll ivs can be changed a litte, for example, you have you have a latios epic +20 but spd is trash, so the solution i think is block ivs that you dont want change , and only reroll spd but paying 100k for each iv block, that is my opinión. I think that can be Good. PokeOne for expample work more or less like that, you can block ivs that you dont want to reroll. I think that thing can upgrade this game.