I'd love to have the Original Trilogy on the big screen again, cleaned-up picture-wise but with no additions however there's a theory that Lucas would never do that because he'd have to pay his ex-wife royalties as she was the film editor of ANH and RotJ.
http://secrethistoryofstarwars.com/marcialucas.html
Kind of a sad story really as Marcia Lucas seemed to be the driving Force (pun intended) behind all of the nuances that we love about STAR WARS today...all of which were obliterated by the sub-par Prequels.