2 Things, you can't have perfect EV's, you can have ideal EV's (You'd have different EV's per moveset/nature). Second, IV's are not compulsory, playing non competitively doesn't require IV's. If you don't want to IV train the pokemon you shouldn't be playing competitively.
Personally, the hacking doesn't affect me since I actually have friends who play pokemon legitimately, but I can still sympathize with the people who play online competitively then get fucked over by hacked pokemon.
Gamefreak already "ruined" it in X/Y anyways, being able to hack isn't much of an issue now, since it's much easier to get Shiny Pokemon and to breed quickly for perfect IV's.I hope they never make one. Hacked pokemon ruin online for me.
Interesting how quickly he cracked the pokemon data encryption and figured out the format though. Though the tool is still very incomplete and a lot of data is not editable and there are no move names.
http://kotaku.com/most-players-will-never-know-about-the-best-change-in-p-1452781951