I'm not interested in DTD at all. I've been to WDW many times and have yet to do DTD. (although we have visited the DL version) I am not into shopping at all, and don't feel drawn to the big theme chain restaurants like Planet Hollywood or RFC. (which we visit at AK if need be--or in other cities)
I think if you are into shopping, and you enjoy your local mall as entertainment, and your kids do too, then I am sure DTD will be interesting and fun to you. People like me who would rather pull out their fingernails than spend a beautiful morning of my vacation taking young children shopping won't care for it. (I am also not interested in DQ--we aren't into the arcade thing either! LOL)
I will say that this next trip we are going with friends and plan to enjoy an evening at PI and may walk around DTD a bit first simply for future reference. We're just not shoppers, don't care for souvenirs (can get what we want in the parks for the most part) Also not interested in the carousel, etc, since there's a free one of those in Fantasyland
Only you know if you and your family will enjoy shopping and eating as entertainment on a morning of your vacation. For us, the answer is no.
(oh yeah, just wanted to say that they have the Potato Head accessories in several places in the parks as well as DTD. In the Judges Tent in ToonTown for one.)