There is no way you meet the princesses, eat breakfast, and be in line at opening with an 8:25AM ADR. Epcot usually opens a few minutes early, raging herds will be stampeding there, and you will just be getting into you breakfast. I would say yes at 8AM. I would never do a breakfast after 8AM. You just can't get through everything for park opening. Some people don't do rope drops and that is fine for them. However, if you want to be in front of the herds, breakfast ADRs later than 8 is not a good idea.