Well, there isn't as much selection there compared to a full buffet breakfast. Do really enjoy the potatoes there, though!
If you are interested in seeing the princesses, and if it makes for an easier day already being in Epcot and having breakfast there, then go for it!
But based on food alone and if don't care about princesses, I'd say skip it. We've done it a few times and have it now in our category of "skippable", that it offers nothing special to us.... whereas for us Crystal Palace is a must do for the french toast, Tusker House for the juice and donuts.