I know my sage has no issues. I jsut rip people apart from a distance, stun them, nail them, push them back.. and so on. I can even do serious damage to groups. Seems the sentinel just is very lacking - we need to be able to slow people down from running away from us and or stun longer. I think maybe the FOcus skill tree may be better, but over all every jedi class and sith melee class needs a way to keep people close and slo them down.. especially if we can be slowed so much and stunned so much our selve.s