All I see is some fresh meat to be poached under the phase empire
My guess is that since they're turning into mascots for every brand willing to pay, they gave takeshi no friends a promotion and now instead of jumping through 20 hoops they also have to do university level essays for anything they want approved. Add the ramp up of live performances and you have some girls deciding to retire and collect royalties now that ame opened that door. I think holo is at that point in which most of the original people will move on, very few places keep their founding members.