Rey definitely only got the big one because of Eddie.
WWE does have the talent to bring in a proper brand split. if nothing else, I'd use the extra hour of Raw to bolster the tag division and IC title. The WHC is being used more and more as an IC type-title, back in the day it used to test someone before giving them the WWE title. It's how the WHC is bring used now, see how they do with that one before putting the big one on them.
I'd love the cruiserweights back, but only if it would be a recognised division, and not as a supply of jobbers for the Big Show and main eventers. That did more damage than anything, using the wrestlers as jobbers, then sticking the title on Hornswoggle.