My biggest problem with DCA is that if I've traveled all the way across the country and found myself this close to Disneyland, I'm gonna need some tremendously compelling reasons to go somewhere other than Disneyland. To me, DCA doesn't really offer those.
WDW's parks offer some compelling reasons to stray from The Magic Kingdom, despite its classic attractions and massive lead in terms of attractions on offer. Spaceship Earth, World Showcase, The Tower of Terror, Hollywood Boulevard, Kilimanjaro, Pandora . . . those are all big-ticket items that make me feel like I'm seeing something incredible and unique in the world. Not to mention the parks being beautifully designed and rich in atmosphere. I'm glad I spent some time at DCA on my last trip to finally see Cars Land, which opened after my previous visit, but outside of that there still wasn't enough to keep me wanting to hang around. What else in that park is both incredible and unique in the world? Where is the rich atmosphere? Some of the WDW Parks have hit a rut in terms of theme (Looking at you, Epcot and DHS), but DCA never had a proper one to speak of, and it appears to be getting worse instead of better. A park needs to meditate on SOMETHING to really be a Theme Park.
DCA, in my opinion, has never come close to justifying the time it forces me to spend away from Disneyland. I'm down for it to be a totally different experience from Disneyland, but it's got to be of equal or similar value to convince me to actually go. I'm still waiting for that to happen. My first visit was in 2001 when the park was still new and awful, and I feel like the park has still yet to lose that scent. The Extreme Makeover wasn't enough.
I wish RSR was flanked by more than flat-rides, but Cars Land is still pretty great. Get something else in the park on that level and maybe I'll take another look. Guardians, Pixar Pier, and what we've seen of Marvel Land all make the park look like it's bunting. DCA needs to hit a couple more home runs before I'll really be interested in giving it more time. Meanwhile the park across the street has decades worth of grand slams to lure me in . . . it's no contest.