Werewolves allready confirmed to be getting a perk tree = Buffed, No need for thread.
It's only been confirmed that lycanthropy is getting improvements at some point. It has not been confirmed yet as to what, how and when they are coming, however. I kind of doubt they would randomly just introduce it in Dawnguard, unless Dawnguard will also feature werebears for some reason or another. I do know that prior to TES V, Skyrim was supposed to have the largest population of lycanthropes in Tamriel, so that may be something that could get touched on to a degree in DLC if Dawnguard doesn't add anything to lycanthropy. Just don't expect them to do a lycanthropy-themed DLC after them having done a vampire-themed one.
On the gamejam clips it shows a werewolf perk tree and it allready looked finished on there. I REALLY doubt they would withhold it for future dlc since this is their supernaturel themed dlc.
Um, wouldn't all DLC for Skyrim be supernatural themed, considering it is fantasy game with supernatural themes?
Also, one final thing: It has been confirmed that one of the patches broke the werewolf beast form's light armor calculations, FYI. I do not know if this has been addressed yet in a patch, but I'm pretty certain that it hasn't.