As much as I enjoyed playing it, it was pretty obvious after the first level that C&C3 wasn't done by Westwood. It just... didn't feel right. Kane's Wrath was the same. I'm sure C&C4 will feel even less like TD/TS, the good old titles, but as long as they don't mess it up tooooo badly, it'll be a good game (whether or not it'll be a good C&C game is another story), and even if my end opinion is that I don't like it, I'm sure I'll at least get my money's worth while playing it.
I'm still calling an expansion to it, wouldn't be an EA game without an expansion pack.