It is built out, but that doesn't mean that they can't re-theme or renovate (yes, all terms we hate). First two things that pop into my head are.... Tomorrowland bumper cars, I mean Speedway

and Stitches Great Escape. Those seem to be 2 of the most complained about attractions in the MK. There have been many discussions as to why the speedway still exists and the room it occupies could be used for something or somethings else. I've never seen a line for Stitch, even in the FP+ era, it's pretty much always a walk-on which should tell someone at Disney that "hey, no one's riding this... why?" and then do something about it. I know that CoP is one of Walt's originals, but how do the lines look for that? Is it due for an update? Could something better be utilizing that space?
Not trying to blow up the thread with the last few comments, but more or less throwing out ideas that if Disney wants to "keep up with the Jones's", they may have to look at some of these things.