We either choose BPass + Thunder Wave or another support move for the last slot, leaving exclusively on Heatran the job of countering Kyu-B, or go Perish Song + U-Turn. I don't really like Baton Passing the Song onto the switch-in, that forces us to switch more without a real reason, thus being crippled even more by eventual SR / Spikes / enemy VoltTurning.
Also, @dragontamer, I don't really see how Tornadus is an issue right now. If they want to use it they must dedicate 2 team slots (Politoed and Tornadus), and since they can't pick two things "last", we'll have plenty of times to pick a Tornadus counter. Politoed makes Keldeo work better, so it's a double-sided sword, and if they don't pick it as last pokemon there is also the threat of a Kingdra counterpick. Yeah, Tornadus can run Rain Dance itself, but I dont think it's something we should be afraid of, currently.
I'd like to use this post to wish a Merry Christmas for you all guys that are making this project awesome, for you random readers and OU subforum lurkers, and to everyone on Smogon that may read these lines.
Not accepting rating requests anymore. Sorry!