Some companies has been doing it for a decade by now. And I believe Soul Calibur IV has had at least one balance patch so Namco is doing it too.
Nowadays consoles has harddrives and are connected to internet so hardware shouldn't pose a problem. It's just matter of will (and money, unfortunately). So, yeah, it really should be a norm. Especially when it's a game which is also played competitively.
But I guess not releasing balance patches would be a good excuse for Capcom to release a new edition of the game. And that way we would get more characters to play with :happy:.