Honestly, who cares?And how many times have you played this game to determine that it's such a small addition it should've been in Tekken 6?
>_>
If even Mortal Kombat - MORTAL FRIGGIN' KOMBAT - can implement tag into its own canon game without a problem and still be successful (heck, DOA's been doing that for years), Tekken should be able to do the same thing by now. Even you, DrDogg, have to admit the time they put into Tekken 6's scenario campaign could've been better used for putting in a robust Tag mode at the time. But I digress... there's always Tekken 7.