I'm assuming the last time you went to DLR, DCA would have been covered in annoying walls, correct?
My first "adult" trip was at the beginning of 2012.
Disneyland was great, but DCA left a lot to be desired... Those blasted walls were all over, it seemed to take forever to get anywhere, no area was "connected" to any other so you have to go "the long way" to get anywhere, and it just didn't float my boat. In fact, while I liked several of the rides, I considered it a big headache to visit DCA!
Now, just 2 years later, the walls are down. Carsland is complete (and AMAZING!). The park is definitely "holding it's own" and it's no longer a headache to visit. Our family loves it! The FP time for RSR is down to a semi-reasonable amount of time, so we do MM at Paradise Pier, and then go get RSR FPs, and have plenty more to hold our interest until our RSR time. It's no longer something to do because it's there, it's now an actual place to look forward to going! I was honestly very surprised when I saw the transformation after the walls came down.
As far as DL itself, there's the new princess fairytale show area (which was great fun to see!). Otherwise, it's Disneyland... and always worth the visit

I can't think of things that are "new" there since our first visit, but I always find something new that I hadn't done in the past, even if it's not new.