It's not 'free Fastrack' though. That RAP user still has to 'virtually' queue. Sure, they can grab some food, have a wander around, but they should still not be getting any quicker on the ride compared to someone in the main queue. I get that it is sometimes abused and staff let RAP users on quicker, but I would argue that's a fault on Towers' part, by not training staff/giving them proper support, and having a paper system in place. It's not the RAP user's fault.
It's a difficult one with people accompanying RAP users. At the moment, the limit is three additional people. So, if you have 4 RAP users, that could translate to 16 people in the queue (4 RAP users with three guests each). It's easy to see how, on busy days, the RAP queues can appear a bit chaotic. I don't think they could get away with lowering the numbers, as it would potentially alienate families.