My boys and I were there last week and the wait times for Space Mountain and Toy Story Mania were up to 2+ hours. I would never wait that long for any ride, but I guess a lot of people would. (we got there just a few minutes after DHS opening and the line for FP was about an hour!)
It was really cold that week-in the 50's-60's, so Splash Mountain and Kali River Rapids lines were walk ons! Yes, we did it, my boys went on Splash Mountain and Kali by themselves, then the next day I brought the ponchos and we all went on Kali. Got a few small spots on us, they were even allowed to stay on and ride again. I didn't want to press my luck so I got off.
Nope, not for me. I would rather be at home than at WDW with crowds like that in the OP when they have to close the park. I can't even imagine how that could be fun.