DCA Has very few premium attractions so they always have long waits. So many guests I talk to say that they go to DCA because they can drink there. It's the park's number one appeal. If Disneyland expands alcohol service, expect DCA's attendance to drop. That, more than any other reason, is why Disneyland is slow to expand alcohol sales. It's coming, though.
DCA needs at least three more headliner attractions to become a true destination in its own right. The current attraction mix isn't enough to overcome its Downtown Disney-with-some-rides status.