Here's an idea, what if he added all the effects Ray Harryhausen style. He has claimed that his original idea for doing Jabba in A New Hope was with a stop motion creature. It would still look new but at least it would be up to 70s special effects standards.
And I certainly don't have a problem with him using new digital effects for the composite like when he cleaned up the matte lines and transparent frames in the Hoth Battle and Rancor pit.