They are also trying to avoid enraging standby guests. Ever stood in line in a normal moving queue only to be >100 people from merge only to stop moving for over 30 min, and then only start moving one party every 10 min? I have on Big Thunder, HM, Space, Mermaid, Frozen, Rat, Cosmic Rewind, Mickey, ToT, RnRC, Rise, Falcon, TSMM, Slinky. Nothing mechanically wrong with the ride, nor has it been down recently, it’s because the LL queue is out the door (you can see it on most rides) and there is no way Disney wants or plans for that. G+ doesn’t cause that, VIP doesn’t cause that (they actively avoid long LL queues) only one LL user left to blame.