The VGU list
As much as I enjoy new champs, I kind of think Riot should stop making new champions all together until they finish the list. Panth, Mord, Fidd, Voli, Nunu, Blitz, and the rest of the list of VGU champs should all be put ahead of new ones. My reason for that belief is that a champion with a newer model and kit will last much longer before needing to be updated, so even if it takes a year or two, the first champ of what I would call the new form would be Sion, he would still be viable, interesting, and have a role in the game.
Lots of VGU champs are just swept under the rug because they have no ideas what to do, and they split the team for new and old champs. Just work on old ones, because if you do what you did with Galio or even Urgot you're still basically making an entirely new champ regardless, so we still get something new visually and gameplay wise.
Also question, has any ADC ever gotta a full VGU? Graves is the only one I can think of but I don't know if that counts.