Removing non-consensual PVP - Only enable pvp in OP zones (players fight for, IE: Ideal end game hunting grounds) and other "pre-designated areas" (Arena's, Battle-domes, Racetracks and Ect.) making DoY a Highly contested end game dungeon with high risk and higher rewards then whats currently available in game. Maybe bring a version of Kamis back or higher/better Mc5's or just have lots of parts drop?
Removing Soul-light all together and faction loss in PvP, since it will be consensual in designated areas and sectors, this could therefore remove the LE debacle from the game entirely and bring NC in line with more current play styles.
This is just a start of ideas several others and myself have mentioned before.