i miss kosuke haruhito, miyamoto liz, mikarin, tomohiro kai, chobipero and probably another dozen artists that don't come to mind right now that quit working with wani and/or bunendo corp.
sadly there's nothing we can do about it :(

to the guy replying to my comment, i'm gonna answer here since you can't make a fourth comment down below (or at least fakku doesn't show it):

miyamoto liz stopped writing chapters for shitsurakuten shortly after her book was released. so my uneducated guess is that it didn't sell well and wani dismissed her. she's still publishing doujinshi on a regular basis. but since it's all love live stuff, irodori refused to publish them, probably to avoid copyright issues. hope another doujin publisher picks her stuff up since her art is gorgeous.