I've been playing this game for a couple days now and I have the say the final boss is the cheapest piece of crap in any Capcom fighting game ever. He takes up most of the screen, has insane counters and can hit you from pretty much anywhere. If a character has to get in close (i.e. no ranged moves), then they're toast. The boss totally kills my desire to play with all the characters since he's so cheap. Also, I wish they would have put some text in the character gallery to explain where characters come from and such.
The fighting is good, but I really wish they'd allow 6-button support for those who are using a stick or classic controller.
Played online and it was smooth as butter and I'm in Japan and wireless. Not sure what you guys are doing wrong, but I haven't had any issues playing online. Just wish it found people to play against faster.