DCA is such a weird case study. On paper, it’s the most successful second gate (arguably including DisneySea). It has a great number of headliners (I’d say Guardians, Racers, Soarin’, Incredicoaster, Grizzly), and a massive supporting roster that makes it to where even on the busiest days, the park has something to do with no wait. Almost every land contains a good balance of headliners, supporting attractions, food and bev, and entertainment. That alone should make it better than all of WDW’s secondary parks, but if asked to rank Disney’s domestic parks, the vast majority of people rank it in 5th (sometimes 4th).
I personally have many theories for why this is the case, but I think it has less to do with the aesthetics and cheese (which have largely been purged from the park), and more to do with having Disneyland across the street.