I think it's weird that there is one class that you have to bring no matter what. Long term, I'd love to see a game where ADCs didn't feel mandatory. Short-term, we aren't trying to push them out of existence, and I'd be pretty surprised if that happened. Even in my long term case we would want them to feel visble, just not mandatory. You're talking about them not getting played at all, which honestly I don't think is likely.