My kids enjoy DQ but I do think it is the red-headed stepchild of WDW's parks - it doesn't entice people to spend more money (mostly they go because they bought the WPF&M upgrade for the waterparks), there isn't much that can be done to alleviate crowding because of the inherently low-capacity nature of the attractions, and I think we're far more likely to see it shut down than significantly improved.
Let's face it, the entire arcade concept is pretty much dead these days - there's just no attraction to it now that we're all carrying phones that give us access to thousands of games with a tap of our finger. I think if Disney had any other, more lucrative use in mind for that space DQ would be long gone.