Because I dont feel like creating another PM, I will just post my question here if thats okay.
What made you give a defensive bonus to double blades and an offensive penalty to them as well? It is fairly wide known that double blades were known for being aggressive and being on the attack often, and thats why they were seen more widely among Sith and dark Jedi than among the Jedi Order, since the Jedi Order was against such use of Aggression in battles and usually preferred more conservative styles and blades.
I realize you might have done this to balance out the two blades effects, but if anything, Two blades should give a defensive bonus as you can cover more ground at once with 2 blades then you can with one long powerful one.