While Coils is personally fun and has a lot of filler content for Alisaie its optional because honestly while the majority of the coils are pretty cut and dry, the major fights in each grouping was a painful learning experience back and even now with the echo at level 50 and its not something you can easily blow through and people would simply abandoned after the first maybe the second wipe. (Twin, Nael, and Bahamut for example). These raids are still tough.

I for one am against coils in a roulette setting. The fights are a quite a challenge still at sync and I don't want to see them nerf it.