I think DLP has a very specific intention of if it knows something is going to have a mega refurbishment in the future (and this could be 2-3 years away) they'll take a step back on maintenance. The most obvious area recently has been Le Pays des Contes de Fees where the overall got pushed back and back and back and unfortunately the ride was stuck in a pretty grim state. Space Mountains external lighting is another example of this.
Re: castle roof this was a Dreams related accident which will get fixed. NBP I am not aware of any specific problems, at most it might need repainting at some point in the future, the panels have now been subjected to 10 years of Paris weather.