Contrary and Simple were really easy to handle if you were prepared for it. And everyone who knew what they were doing was. But when they started spamming them, it could get annoying having to play using only one or two members of your team because nothing else can handle them. And if your counters got KOed by a crit or somesuch, Prankster D-Bond is only going to save you so much when they're spamming six Contrary/Simple abusers. Or Prankster Spore when they're all holding Lum Berries.
It made some games come down to a case of "If they don't crit, I win because they can't break my defenses. If they do crit, I lose because the rest of my team is designed to handle other threats that'd steamroll me otherwise."
Topsy-Turvy at least discourages that by punishing the hell out of someone trying to abuse those two abilities (or Evasion BP spamming... ewww).
It made some games come down to a case of "If they don't crit, I win because they can't break my defenses. If they do crit, I lose because the rest of my team is designed to handle other threats that'd steamroll me otherwise."
Topsy-Turvy at least discourages that by punishing the hell out of someone trying to abuse those two abilities (or Evasion BP spamming... ewww).