If DC Imprints works out maybe the Marvel section could get something like that too. That would create a place for Icon titles (yeah, I know there's only about 3 of them) and the literary adaptions and licenses (and MAX too, I suppose). Powers and Dark Tower don't really fit in Marvel Universe too well.
I'm guessing Marvel is just busier or it wouldn't need boards for Avengers, Hulk, Spider-Man, Ultimate and X-Men titles. So maybe it can't be streamlined as easily as DC.