once a sorc force sprints away how does a operative catch up to him? you have dots on you so vanish isnt going to do much
the answer is you get kited and you die, once a sorc gets distance on a op he has to run away and los or die
edit: in your post it seems that you dont know what the word "gapcloser" means, it means charge, sprint, or any other mechanic that brings you close to your target when theyre far away