Contemporary as far as I know is STRUCTURALLY sound, but the plumbing and other systems are all showing their age. If you're ever in the Monorail station at the Contemporary look over at the windows-- there's always at least one room that's leaking water into the floor below. Pipes only last so long, and they're just wearing out with age. I know that the Contemporary had to install a boiler a couple of years ago because the co-generation steam pipes from the RCES plant behind MK had deteriorated over time.
As for the Monorail, the current situation with the EPCOT line closed and reduced daily hours actually means the trains are getting some much needed work. Having 9, 10, or 11 of the 12 trains running every day for almost 20 hours a day meant little to no preventative maintenance could be done. Having 3-4 trains out of service each day and 8 hours of downtime each night means they can fix things at long last.