I think a lot of posts in this thread have argued something like this: pokemon x and y are the strongest pokemon in the metagame, therefore they should be banned. However, there will always be a few pokes who are the best or must useful in the tier. The question is: how large of a gap are we willing to accept between the best and the rest? This varies among players, hence all of the vitriol in this thread.
For me, Keldeo is clearly a powerhouse, but not to the point where it overwhelms the metagame. He's a terrific choice item user (he can avoid the drawbacks of other choice users because Hydro Pump is so powerful in rain), but does face competition from the likes of Latios. Keldeo nearly always ko's something, and can clean up a weakened opponent, but I think that's a reasonable expectation for any elite offensive pokemon.
I think Tornadus T is a bit different. He's the toughest poke in the tier to play around, since Hurricane + U-Turn can cause his checks (which do exist) major problems. He also has little competition, due to his unique speed tier and ability. I'll need to test more to come to a final conclusion (could anyone post a battle between two competent players where Tornadus T completely swings an otherwise close match?), but I think he's right on the edge of overpowered.
For me, Keldeo is clearly a powerhouse, but not to the point where it overwhelms the metagame. He's a terrific choice item user (he can avoid the drawbacks of other choice users because Hydro Pump is so powerful in rain), but does face competition from the likes of Latios. Keldeo nearly always ko's something, and can clean up a weakened opponent, but I think that's a reasonable expectation for any elite offensive pokemon.
I think Tornadus T is a bit different. He's the toughest poke in the tier to play around, since Hurricane + U-Turn can cause his checks (which do exist) major problems. He also has little competition, due to his unique speed tier and ability. I'll need to test more to come to a final conclusion (could anyone post a battle between two competent players where Tornadus T completely swings an otherwise close match?), but I think he's right on the edge of overpowered.