Picked this up last night and I must say it's pretty sweet. I only got to play it for an hour or so but I was destroying people with Tyson.
The new punching system is pretty sweet and you can unload a flurry of punchs with out having to do anything crazy. I also like the fact that if I dodge or block a punch and I come back and counter that other guy it hurts him more
The stamina and blocking "health" bars are a nice touch as well. For example if you are unloading on someone and all they are doing is blocking their block meter drops and eventually they can't block anymore until they back up or your stamina drops.
All I gotta say is just hope and pray you don't get hit square with your stamina down, cause it wrecks your day.
All in all this game is pretty sweet and if anyone wants to go a couple rounds hit me up! jpats05