Although I'm not in favor of the proposal, I imagine proponents would reply: Han shooting first, no stupid Praxis rings around Alderaan/Death Star/Death Star II, no CG silliness or obstructive Ronto butts in Mos Eisely, no bathrobe emperor hologram in ESB, no Fraggle Rock characters in Jabba's Palace, no silly beak on the Sarlaac, etc. In addition to all that, the colars would presumably be fixed. Although I disagree with the position (as it can't really be considered a true restoration), I do understand the sentiment behind wanting to see the OOT in substance but without the warts.