I think that if they were to take away the fireworks completely it would definitely kill the magic of some guests.
Most times a staple of some vacations is going to see Wishes or Illuminations the night before you leave. Kind of like your big send off to wrap up your trip, and if they took away that show, trips could be left with an empty void.
This is, of course, all contingent on whether you like fireworks and the shows they have them with.
Me personally, I'd be super disappointed. The music and technology being used to tell the story of Illuminations is by far top notch and for them to just stop it would downright take away the experience of Epcot to me. When I think Epcot, I think Illuminations and the barges in the lagoon.