Firstly, I second this disgust at the changing of the sleep mechanics. Sleep was already over-powered, and Troll Freak just went and made it even better, essentially to the point where a sleeping pokemon is a dead pokemon.what i learned is that i want to murder the people at gamefreak behind the sleep mechanics changes.
i hate gen 5 sleep more than ANY OTHER CHANGE in Gen V.
having to stay in to wake up is utter bullshit and overpowers sleep.
having a key mon slept for more than 1 turn equals death almost all the time.
i pray to god nothing ever gets prankster spore/sleep powder/dark void.
Secondly... Oh god, Prankster [Sleep Move] would be ridiculously OP; send it out turn one, essentially Insta-Kill a pokemon.
But I digress...
Though I've been playing pokemon since Gen II, Gen V is the first generation in which I've played pokemon competitively, so I can't really compare to other generations' metagames. That said, I feel that this generation has taught me a lot about strategy (even if I'm still not very good at it ;) ). What with Team Preview, weather wars, and the various kinds of team archetypes that one plays against (Volturn, Hyper Offense, Bulky Offense, Sand/ Rain/ Sun based teams, which may be stall/ offensively focussed etc) it really encourages thinking. To be someone who goes a bit against the grain here, I think OU has become a pretty awesome competitive tier, where a combination of skill, calculated predictions, and a keen eye for team-building are all rewarded. Sure, you may occasionally lose to luck, but that's just to be expected, and to be honest, I think we're at a point where any luck-based wins are few-and-far-between enough that there's really no cause for concern.