I’m feeling that it needs to be less Skill specific, and more Gameplay specific. I like triggering things with skills, animation cancelling, and flow of play over any basic damage boost.
It’s all about power, so if you fired Elemental Arrows while channeling, animation cancelled Spike Traps/Caltrops while channeling and increased movement speed while channeling, you end up with more Strafe/Rapid Fire builds than a set just about any one skill.
IMHO, I think the gameplay differences between UE/M6/N6M4/S6/LoD are amazing. If a new set is added, it should change gameplay on these levels.