I think Bartitsu isn't great. Think Master of Souls Ermac without a projectile, even slower normals, no unreactable vortex, worse mobility (which is saying something), even worse risk/reward and gaps everywhere. It has the slightest bit of potential because of its range and he has a strong corner game if you can somehow get the opponent there but the lack of safety, bad mobility and terrible risk/reward are too much of a problem for him. Almost everything he does has a gap, is unsafe on block or both and against someone who knows the matchup (how to option select everything) it's really not as easy as, to quote Paulo, "walking mixup blender of death".
Myri what "true vortex" are you talking about?