I know for sure that the July 4 RoE this year, was about 30% the amount of pyro that was used in previous years. So they are cutting back with the show on special event versions.
I wouldnt be surprised to start seeing elements cut from the show, reducing pyro content etc....
That seems to be a best case scenario.... dont even think about the worst case scenario!!!!
But the fact that the July 4th show was cut slightly just can't be good! Surely it's worth their while to keep RoE in top form because of all the people it brings into the park.
I would highly doubt you will ever see RoE go away. RoE is the big driver for folks to stay in Epcot and eat in the places in World Showcase, alot of which are outside companies which would hate to see that buisness go away!