Yes, It would seem that a simple number buff would be easy; however, I will refer you to Patch 2.6.5 and Nevs recent response to Free. All classes to differing extents have issues for parity within class builds (see DMO for bazooka or VYR-Chantodo).
I am giving my own prior suggestions in this thread the Spock eyeroll treatment.
In a new thread, I have proposed a solution for ALL CLASSES relative to class parity for top builds that does not require any buff to items or skills. It would simply be a DPS modifier. It would also buff all builds within a class relatively equally.