If you go down the tank tree, you get 3 stuns from 30-32 (Hilt Strike-melee 4s stun, turn force stasis into instant instead of channeled, give force leap a 2s stun). Late 20s, you also get Force Push, which is awesome on the catwalks in Huttball. Also, force leap is a 2s root untalented and Freezing Force is a 50% aoe slow with no cooldown (you get those pretty early).
Before that focus on being a defender--Guard the healer or squishy dps and taunt anyone who isn't attacking you to reduce their damage by 30% for 6 seconds. You actually get rewarded for 'protection' in WZs, so abuse it.