What do all (or most) of the most picked top laners (competitively) have in common?

Sustain.

Irelia? Sustain. Olaf? Sustain. Swain? Sustain. Maokai? Sustain. Vladimir? Sustain.

Riot, you can't expect to nerf sustain on almost everyone except a few and then expect that few to not be overpowered. Seriously, this really is the worst Season by far. And I've said that every Season since Season 3 (I thoroughly enjoyed S1 and S2).

Season 3 "there's no way it could get worse than this." Season 4 "there's no way it could get even worse." Season 5 "There's no way it could get even worse than that." Season 6 "Yeah, there's no way..."

Season 7 "...there's no way..." coming soon to a theater near you.