I agree completely. That's probably why VF5 were less than stellar even though it had little competition. Personally I just like VF better as a game, but that doesn't mean I paid $60 for it either (bought it used). What I'm saying is that if VF couldn't succed even though it's IMO a better game and looks better to boot I don't see this one making it at full price.
I would be willing to bet that a lot of the appeal to gamers is lost because it does not support online fighting. The only reason I play DOA4 anymore is to compete online. I don't care if it lags sometimes, it is just so much more fun. I am not going to spend $60 on a game that I can't play online, unless it is very story oriented and exploratory/open-ended (like stalker). Fighting games don't have legs unless they have online. I think sega will go this way for VF6. Their "we need 1 frame timing" speech will go out the window.