nah, i think adcs are on a pretty decent power right now, tho i kinda hate seeing so much tristana. i don't mind caitlyn really but tristana is really a rotten champion
like i dunno, what's the difference between adc damage coming from crits or straight ad? the way the game is since 4.10 is that you actually get more time to shut them down, specially if they're going for ie first, so i don't really see where your complain comes from
lategame, the only thing that's changed is they've gotten 10 more ad (who gives a shit about that, also they've lost 20 from bt) and a bit more attack speed, which matters, but again who cares. they lost for it a decent amount of lifesteal, so i'd say it mostly evens out
as for ranged top laners, this is not lcs, if you're renekton you can shit on any lulu you can find (everyone finds lulu boring in a solo lane anyways so i never ever see her played) and i haven't seen much difference in my experience lately. i think melees still have a place, nothing has really changed imo