Vince Neil's voice has been deteriorating for years now. I felt Corabi was a much better singer (when he was in the band). I guess if you know his voice is stuffed, then it is not a huge disappointment. They use female back up singers to hit the high notes. I feel for Mick Mars - still one of the most underrated guitarists in Metal, but his health is also on the decline. There are a lot of great docos about the Crue on Youtube - These guys are lucky to be alive.
Stanley's voice is also in the decline. Throat surgery didn't help. In theirs 60's now, so it might be getting closer to pulling the curtain. They still rock harder than bands half their age and I'm looking forward to the Melbourne shows. I'm going with two other friends that I used to go to gigs with in the late 80's.