Basically everything is a repeat question at this point, but no need to apologize. Everyone is on edge and the thread is already 39 pages long! 🙂
Your question is one of the better ones, and you have a pretty good handle on the situation. If the school sent you an e-mail saying they are full AND told you they only made 1 WL call (were they really that transparent?), that's a sign there is not going to be a ton of movement.
There are less than 29 more attractive schools (plus IS state schools), and people would need to be called off another WL to create a vacancy. There are only so many schools more appealing than this one, so it does not look like there is going to be a lot of movement. Is there any way you can find out where you are on the list? If so, THAT would give you the information you need to be able to intelligently forecast your chances.
There is always hope, but, unfortunately, there is less hope here than at other, maybe lower ranked schools that are experiencing far more movement already. Sorry.