Suggestion/New Idea/Please be critical

So I'm tossing this idea how cool they have this choose your own adventure thing going with bildgewater and I'm thinking to myself and maybe this has been thought of before, but what about summoner spells? Have it so that at a certain point there is a choice of whether you want to hve one or the other? So not everyone will ever be able to just choose based on the situation, based solely on how they chose to grow?

League please don't hire me on the spot, I want to earn it.