I think that if we must preserve the original one, we must preserve it with all of its flaws, like matte lines and transparent objects. We shouldn't be preserving those just because we don't want Greedo to shoot first, but because THAT was the real Star Wars, the original one, the one film that deserves all our praises, even though it is flawed.
Of course, for a special edition, all those technical glitches must be removed...