I love DS. And my only regret for my commando itinerary for my upcoming (short) November trip is that I chose NOT to include DS in my itinerary for "relaxation" time. My trip this time will only be for 5 days, expressly just for TSL / SDD and Mickey's 90th Birthday on the 18th. For DS, I will only be "dropping in" to visit the Edison (ADR) and to visit the Polar Bear at CokeCola (always forget about him!). So my time there will be limited, unless I find that I do indeed have more time based upon how my touring goes. It's my hope that my schedule does indeed allow time just to "hang-out" at DS. I plan extensively (with great results, always). But to me, even if I am not dining anywhere, or buying anything specific, I enjoy just walking around DS. I love entering at THE MARKETPLACE entrance for the nostalgia of it, and just cruising around, getting a bite at "wherever" and picking up an item or two at WOD. Nothing more.
So.. moving on to my short answer, yes, I always think DS is worth it. Just very relaxing in general. A refreshing change from the parks.