Not sure what your length of stay or party size are, but BFF and I always rent a car - we stay on property but dealing with Disney transportation is too big a waste of time! We rent a midsize car for about $150 for the week - we've never used it to eat off property, but it's worth it just to not have to deal with the buses; even helped with us to make our resort restaurant ADRs
Back to the OPs question - DDP isn't something I like to do because I don't want to waste park time waiting for a ehhh meal at a TS restaurant. Also, I wouldn't order dessert at most CS places so there's no value there.
There are a couple of TS places I like - love the fried chicken at 50s Prime Time, still a fan of both Boma and Ohana. Otherwise? I'm fine with breakfast in the room, counter service and snacking thru the trip.