4 roles champion

Greetings fellow summoners. Today I came up with a real interesting ulti-passive designe. I though about a champion that wen he spawns he has 3 spell available to power up, Q. W and E. But wen he hits sixth lvl then he can choose between 4 different roles: Mage, Marksman, Tank and Support, us he will be able to switch between the first role ( neutral : witch means he can play either ad to be a fighter or ap to be a mage) and the second wich will be the one of the four that he chose. In each of the five roles (tank support mage marksman and neutral) the champion will have 3 different basic abilities. At lvl 11 he will be able to choose between of the four except the one that he already chose to replace it with the neutral one. I believe that this kind of champion would bring really interesting mechanics and strategy to the game us well us he would be , I think , easy to balance by making he's kit really unforgiving.

I hope that my idea has inspired you.