Arms has many supports that can be useful for the raid, despite the fact it is not really a viable dps spec, since fury is way way better than this, in Naxxramas and Ulduar content you can still get away with playing arms, atleast your support is good enough.
Fury warrior is top dps in ICC with fire mages, even beating mages on some fights. Fury warriors start really slow in this expansion, it needs good gear to have good dps unlike many other classes like warlocks or mages they are good in earlier contents but fury warriors start to shine at the end of Ulduar but the best for them is the ICC content....
Protection warriros are underestimated, but it is a really good tank and on retail most main tanks were warriors, but it can be because of the facts that most of the tanks were warriors since the vanilla legacy was still there. But as a summary, keep playing warrior tank, it is fun it is good so why not?
