Also I think one big thing is to have the New Light-saber blades look and colors match the OOT.
I think it is O.K. to make Vader's Light-saber color Red and not OOT's Pinky-Red.
Luke and Obi-Wan's Blue Light-sabers needs to be OOT's light blue color and not PT's Royal Blue color.
Luke's Green Light-saber needs to look the same at in OOT and not like PT's Green Light-sabers.
The Shape of Light-saber's Blades need to be the same OOT shapes and not PT's Neon Tube look.