Well both offensive teams should have the firepower necessary to win and a reasonable degree of synergy, if it doesn't then its just a bad team, so that first point is a bit of a generalization lol. I agree with the weather checking part but it's not like you're playing with 5 Pokemon because you have to set one slot aside to check weather. Most BW2 Stall teams are something like SpD Hippo/Skarm/SpD Celebi/Heatran/Jelllicent/Starmie, the Heatran is obviously there to check sun but that's not all it does; it's a Scizor check and walls a **** ton of other Pokemon and set rocks on them, take Latios Draco Meteors, etc, same goes for offensive teams, Rotom-W checks rain but is also a great pokemon and partner for U-Turners outside of it. There are also more anti meta sets like subtoxic tentacruel that often straight up wreck rain teams if you can lure in Politoed to let tentacruel set up. Also, I think there's still a bit of creativity in BW OU. Also, all the regulars didn't leave [and the forum wasnt destroyed] because of BW OU being a bad tier. Myself and Vrai left just because we were sick of the forum and wanted to battle elsewhere, nothing to do with BW OU at the time, Aero wasn't happy with some stuff about the forum either, most of the others just left because of stuff in real life, I thinK Dark Azelf is the only one who really quit because he didn't like the metagame but I realize im speaking for him so im not entirely sure if its the de facto reason why he quit.