Do you think that there are too few skills ?
I think there are quite enough WEAPON skills.
However:
-Some of the weapon skills would use changing them into some more flexible (versatile) versions. For example make unsteady ground behave as combo field or turn gust into a whirl finisher would be cool
-Many utilities would need adjusting as well. For example glyph of reneval should work on the target given, not on the area near you.