So, personally, I'm with TFC on this one in that I think we need to give Kanga more time in OU. I feel there is still a lot of potential for Pokemon to do well against this thing among guys who are not seeing a ton of use yet. I personally love Gourgeist against this, and I have a feeling there are probably more as well, and that we simply have not given ourselves enough time to adapt and try and locate other such Pokemon. With that said, I would also like to try and make counter points to a couple of the pro ban arguments being thrown around:
Too Powerful: Well, honestly, I think this one is just an ill founded argument to begin with. In all honesty, simply saying "Black Kyurem" should really put any "Too Powerful" arguments to rest after last gen. Yes, I know Kanga's "effective" attack is higher, but Kyu-B has a higher power STAB putting it at almost the exact same power level, and still having item access. Oh, and by the way, it also can ignore Sturdy. Yes, I know Outrage has drawbacks and Kyu-B has a ton of other problems, but that is not the point. The point is that sheer power of this magnitude has precedence in OU, and that alone is simply not enough to merit uber placement.
Restrictive to Teambuilding: First off, I simply don't think this is true. I think the Pokemon who can do well against it are good enough and plentiful enough to not really be restrictive. Packing one or two counters sounds bad, but in reality its really not. Pokemon are good because of what they beat, and I personally feel that enough Pokemon that can take on Kanga can also take on enough other Pokemon too to earn teamslots regularly. However, with that said, one of the key points people are bringing up is not just the quality of what beats it, but the fact that it can choose what beats it. That right there is again something I think is a flawed argument. I mean, correct me if I'm wrong, but the "chooses its counters" argument was one I remember being thrown around a lot regarding one suspect last gen. Keldeo. Who was voted OU. Twice. Now, that is not to say that the ability to choose your counters is not something really powerful, but again, I think it is the kind of thing people are trying to trow around to claim something is obviously broken, when we have precedent that obviously says otherwise.
Don't get me wrong, I can definitely see the arguments in favor of banning. Kanga is strong as fuck and has many of the right moves to take advantage of all it has. I just personally feel that the pro-ban arguments have enough flaws in them for us to wait a while longer and really let the metagame develop a bit more around it before we make that call.