The game has some combat depth, but:
1: it is not needed/visible. I went through single player using one build, because they all felt the same. Spam skills from 1-5, occasionally something from the second bar. Repeat 3k times.
2: in comparison to this: http://www.gwpvx.com/PvX_wiki any discussion about GW2 combat depth feels shallow for me… Or maybe I am just a GW1 veteran that is VERY dissapointed.