I agree that a lot of work needs to be done on the PT, but I think a lot of people are scared to touch the OT and make drastic changes. The only way to make the story work chronologically is to change both of them to fit a new, single continuity, because neither of them lends enough to the other's continuity through changes to a single trilogy.
Removing "Skywalker" from the PT becomes awkward because you have to cut nearly every formal reference to Anakin, and his reference to his mother.
Also, without the "Skywalker" in the prequels, there is less impact with the discussion of "Anakin Skywalker" in RotJ