This change was never going to "fix" alliance roulette because ilevel cheese was never the main cause of "Crystal Tower Roulette" in the first place.

Fact is, CT is the lowest common denominator. It's lowest level and the only set everyone is guaranteed to have unlocked. In order to get Nier in roulette, every single person has to be level 80+ and have the raid unlocked. Meanwhile it only takes a single player below level 60 to toss the other 23 people in CT. It will ALWAYS be the most common raid, ilevel cheese or no.