I think Fantasmic is such a classic at this point, I would certainly hope that it sticks around in the future for DHS! As for complaints with the new DL show, I could go on about Pirates but my point is the sane as everyone else's. I think that DHS has a lot more live action sequences, so losing Pocahontas is really going to bite. Aladdin, Tangled, or PatF (please, please, please) would be great replacements, as would Moana! And I just love all the goofy villain placement in the DHS show, mixing up really competent baddies like Ursula and the Evil Queen with Frollo and Hades (evil for sure, but they don't fit the tone as well) It always cracks me up seeing them all together, and I really hope that isn't lost in the future.
As for the dragon, I heard that the animatronic dragon cannot be so easily implemented in Florida because of space, is this true? And if so, could this be fixed with time?