I've watched edits of the prequels that were quite a bit better. Generally they remove all the corny toilet humor, and eliminate Jar Jar wherever possible.
One of them dubbed in an alien voice for Jar Jar, and viewers had to read the subtitles in order to follow his dialogue. That alone made a tremendous difference; just shutting him up altogether.
That's sorta the problem though. With the OG Trilogy, fans generally don't care for the Special Edition edits, and want the original cuts released. (Greedo shoots first, the awful Jabba song, and so forth)
With the Prequels, the original cuts are essentially unwatchable, and they get quite a bit better when someone edits the ever living crap out of them.