"We" includes the guy saying "skins are fine," in reply to the same comment.
Yes, optional skins are fine. I agree with that statement.
If I buy the game, right now, all of those characters are in the game... but I don't get them. I can get my ass kicked by them. But I can't select them.
This is a good thing, because it means that you can still remain compatible with any opponent even if you choose to stay on the base game. The alternative was the old model where you HAD to buy every upgrade from Street Fighter IV to Super Street Fighter IV to Super Street Fighter IV: Arcade Edition to Ultra Street Fighter IV, or else you were left behind and could no longer play with the rest of the playerbase that moved on to the latest edition.
Would you rather have that be mandatory? Is that the model you want to go back to?