Been playing this game quite a bit. Like I thought before I even touched it, I'm not a fan of tag team play and I'm not a fan of how this game feels. It's going to take a lot of getting use to and I do kind of like it but I don't think it'll take over SF4 as my main game. I just hope the SF4 player base doesn't completely abandon it. They should definitely disappear at first, hopefully a lot of them will be back though.
I'm kind of mixed on team based fighting games, when it's a two character team I can dig it, like XvsSF, MvC, Rival Schools, etc. Once they get into three characters, I lose all interest, which is why I don't play KoF, Marvel 2, Marvel 3, Project Justice, etc.
That said, SFxT is pretty fun so far, though I can't really grasp what kind of Tekken character I want to use since they're so different in style from the Capcom crew, it's like I have to learn a myriad of target combos and command normals to play any of them. Though with the gems being like they are with DLC being objectively superior to stock, I kinda wish they ditched that whole system.