I've never had too many real big issues with lightsabers in the SW films except for A New Hope, which IMO Ady fixed very well... I mean, it's either fat lightsabers, or the junk that Lucas wouldn't fix.
The lightsabers were a bit fat in ROTJ, but they truly don't bother me that much... Gosh, Ady, are you gonna try and mask that? Are you gonna do some kind of reflection effect? If i'm even making sense. lol