Alliance raids are one of my favourite content and being stuck doing the same one every day or just have to wait long periods for specifics is not a nice thing. I personally think SE should do something about it, and in a way, people that drop their ILvL are defeating the purpose of the roulette. With this said, I don't think anything good will come by forcing people to do stuff they don't want.

IMO, is a better idea is to move the current XP to leveling roulette and making alliance a max level one that enforces a minimum ILvL to que up. With the appropriate rewards will work. This treatment probably could be extended to any other roulette that suffers from the same problem.