New champion idea

I had an idea for a really cool champion (We will call him C, for sake of ease), and I was hoping for some feedback/ideas/maybe consideration from Riot to make this happen. It would be one of the two-part transforming champions, but instead of just switching abilities and from melee to ranged, this would totally change the champions role. Like one form could be a kind of support healer, then they could switch to a damage champ. I realize this could be hard to pull off, and it would be a complicated item build, but C's two forms could both scale off of AP, and maybe some health, since that's a pretty universal thing. He could kinda be an AP tank I guess. He could even have kinda different stats in each form, like Gnar does. But I mean you could be a damage dealer in one team battle, and then the next be a support. This would also offer and interesting laning experience, you could go full support in bot lane, or go full offensive in top or mid, or maybe even have a ganking-centralized jungler who uses a good mix of both. And maybe you could get benefits for devoting yourself to one form more, like increased power in one form if you stick with it for a little bit. Or maybe you would benefit more from using a good mix of both. I feel like this could have a lot of potential, and would offer a good amount of interest and variety. No two games with C would be identical, and you could have him on each team, with each player using him totally different. What do you guys think?