Maybee....we stayed a couple years ago and because of a tree could not see the fireworks. I found however, that the staircases are on the outside of the building. We just went up about three fligts and stood in the landing of the staors and wathced them no problem.
Because you are a distance form EPCOT, its not a great show, but not bad. If you want to sit and watch them , go for it, otherwise, use the stair case landings.