I think OP is a bit confused, these restrictions already exist. You can't queue for like world of darkness if your itemlevel is below 90. That is the reason why if you push your itemlevel below that you will only get either crystal tower or labyrinth.

Fact tho is that SE can never change this cause of how the roulette works, you can complete the msq without ever doing a different raid than the crystal tower raids. So if a player who has only ever done these queues for alliance raid roulette it will be anyways just one of these 3. Which is one of the reasons why the crystal tower series, as the mandatory msq raid, will ALWAYS pop much more frequently than any other alliance raid even without the cheese.

Sucks i know but there is literally nothing that can be ever changed or will get changed about it, put your energy into something else than crying over it i would say, just move on.