A few thoughts from a new level 50 SMN:

1) We should be able to command our summons 100% of the time. When we are casting, we should be able to tell the pet to do something. When I am riding my mount, I should be able to tell my pet "back off".
2) Turning SHOULD NOT interrupt a cast. Furthermore, SureCast, which stops you from being interupted (BLM spell), needs to be fixed. Either the wording, or the spell, because I get interrupted when I run with it on.
3) Pet's need to be quicker to respond to commands. I tell my pet to attack A, he hits B 2 times more before moving to A.
4) Tri-Disaster.... really? It's "Binding" the enemies which causes my pet to disengage. Why would it disengage on a root?
5) Ultimate spell, I think this really needs some help. Not huge damage, and the animations are quite low. Would love to see a pseudo/alpha image of the primal during the use.