To crits: it is now possible to get a 100% crit chance. That is far, far more competitive than any other crit chance because it's a certainty, not randomness.
To Megas: I have no idea what you're talking about. A competitive game is about strategy, planning, and decision-making. Megas add planning in that you can choose one per team, decision-making in that there are some where you won't always mega turn 1, and strategy by increasing the pool of usable Pokemon.
To Aegislash: It's a Pokemon whose entire viability depends on outpredicting your opponent. It's entirely a competitive being.
To lack of tutors: see RB, GS, RS, DP, BW.
To IVs: lack of removal is not a change.
Matey, I think ye've just sailed into a whole new ocean of stupid.