I have had endless PvP success with this build after months of tweaking and playing experience in beta. This build is extremely flexible in all situations and poses as a huge PvP threat to any class you face. With the right understanding of this build and smart playing you will destroy any opponent you face. Most of the non ganking battles I have I end up with over 50% of my hp left if not more.
About you
If shamans could only have 6 more points (call of thunder/elemental fury); we would light up all other classes like a Christmas tree in Hell. But consider this: Take the 5 points from Ancestral Knowledge and the 1 point from Two-handed Weapons; and put them into Call of Thunder; and into Elemental Fury. It makes sense considering that without 5 points in the enhancement tree for ancestral Knowledge; you can't put the extra point into Two-handed Weapons; so using a staff or other one-hander would carry a higher value.