I'd like to see the WWE WHC, the WWE Womens, and WWE World Tag Team championships to be on both shows. I'd redesign the Tag titles to look like the WWE and Womens belts. The IC would be on Raw and the US title would be redesigned to its classic look and be on Smackdown. Bring back the Cruiserweight title for Smackdown and the European title for Raw.
Actually think this would be cool look for the new Tag Team titles. Put Tag Team Champions on it and the red and blue represents that the champions are on both shows.