(Exp Share being an Exp All without a way to share to just one pokemon)
What's not to like about this? Aside from it making the game far easier, but then, Pokemon was never immensely difficult.
Sometimes I don't want a full team gaining masses of Exp. Like if I catch something in X/Y or ORAS that is underleved, I'll stop and go grind it alone instead of sticking the Exp Share on it and continuing on.
Pokemon has never really been hard, but Gen 6 feels too easy.