To each their own. Guardians is fun, but I've gotten stuck in that boiler room in a slow, barely moving line a few too many times. Seems like they're ALWAYS sending me to whichever set of elevators is running under capacity, and usually the one upstairs to boot.
I don't care for Monsters Inc. Going on the Tokyo one first did the DCA ride no favors, and now, with the ride on LL, it's really killed the ride for me, as it is neither worth a long wait, nor something I feel is worth a LL.
Cohesion is absolutely a problem, as is the park's wacky layout. I'm sure the new rides will help, but I'm not sure anything can really give DCA the permanent fix it needs, especially because Disney seems to actively erase things about the park that do work.