Can't we just keep them both in OU?
Keldeo has like no usage now and is really easy to counter, plus it sucks outside of rain.
Tornadus-T is a bit worse, but scarf users outspeed and ko it, and tornadus-t lacks the offensive prowess to OHKO anything anyways, so what's the point? I call for a drizzle ban, not some attack on every pokemon that can remotely use rain to it's advantage......
Keldeo sucks outside rain??? KELDEO SUCKS OUTSIDE RAIN??? Guy, I beg that you are joking. It is bad on sun (although Specs-boosted Hydro Pump still OHKOes Ninetales... under sunlight). But Keldeo can still wreck avoc outside rain. Although it's a matter of fact, that Keldeo, under rain, has the power of Arceus himself (this was only a metaphor). Specs Keldeo has no safe switch-ins at all.
Although I find all sets, except Scarf Keldeo, to be somewhat manageable. Despite having few safe switch-ins to begin with, they can be revenge killed with much more ease. The Calm Mind set is harder to revenge kill because it boosts its own Special Defense, which means that it is harder to revenge kill with special attacks when they aren't super-effective. However, the Scarf Keldeo set is a problem. You must be prepared for it at all costs, because it can sweep your team if you don't have any means of dealing with it. It's simply very hard to deal with; there was a time that I had to use Choice Scarf Tornadus-T to revenge kill Scarf Keldeo! As there are almost no offensive checks to it, you must resort to defensive checks/counters, like Specially Defensive Celebi. So I think that this alone, can be reason enough to make him ban worthy, although I am not sure. The idea of banning Keldeo never came to my mind before.
As for Tornadus-T, it would be interesting if it was banned. The normal Tornadus could be stronger, but it was much, much more manageable, thanks to its lower defenses, lower speed, and a lack of Regenerator. If you don't have something like Jirachi, specially defensive Rotom-W, or if you don't have means to revenge kill it (thanks to its high speed, you need something that has Choice Scarf to revenge kill it... and there are some Scarfers, like Tyranitar, that are still slower than Tornadus-T!), good luck trying to take down Tornadus-T. T The latter can even be bypassed by Substitute, which is a rare move, I admit, to be used on Tornadus-T. But I've used it on the past, and I never had problems anymore, with revenge killing. The former can also be bypassed, by Heat Wave, although Heat Wave is useless on rain teams, but one must always be wary of that move. The fact that even many Pokémon that resist Hurricane take heavy damage from it (such as Rotom-W that doesn't invest on special defense), and the fact that Tornadus-T can mantain momentum and bypass some of its checks with Superpower, means that I am inclined to agree with Tornadus-T ban. However, I must see more opinions about him to make a decision.