The only thing we miss when we go to DL/DCA is EPCOT world showcase. Outside of that, DH would tell you he prefers DLR to WDW, and we are long time WDW people. There is a lot less hassle because everything is in walking distance. For a WDW person the 2 parks just feel like one big park (highly recommend hoppers as hopping takes 5 minutes), and then DTD is right outside the park gates. There is plenty to entertain you at DL/DLR-- plus you get to experience Carsland, Avengers Campus, the Alice in Wonderland ride, a better Space Mountain and POTC, Indiana Jones ride, and more!
Also we like that at WDW, we spend 8 nights and never leave the property, but at DLR, we fly in- are in a park by 1:00 p.m., spend 4 nights (partial days in the parks on arrival day and leaving day), and then spend 4 nights somewhere else in California doing something else fun. We usually head down to the San Diego area and beaches in between, but we have also gone the other way to Universal/LA. If your DH is wanting something more low key-- I highly recommend going south towards San Diego instead of North towards L.A!