For attractions that are open 365 days a year, I think Disney does a great job in keeping things up and running! Remember, Disney and the other Orlando parks do not close like those of Six Flags and other parks. While they're doing refurbs in the winter, Disney and the rest of Orlando are packing them in!
Yes, we all will like to see something done with specific rides of our choice but we're not the boss, we have only hopes and dreams of seeing Spash working at 100% all the time, Buzz getting a paint job, and other attractions getting the attention they need!
I think Disney knows this. They just reopened IASM a few months ago from a lengthy rehab and I'm sure the have plans to rehab other attractions in the future. Remember, money doesn't grow on trees for us, and not for the mouse. We all seem to think Mickey can cut a check for whatever he wants. He can cut a bigger check for something than I can ever write, but we all know economics and that just means we have to wait until it's our favorite attraction's turn for a fix up... Then we can all start to complain about it being closed for a few months.