I agree. If Kotal doesn't go 5-5 against every character through variation switches he has to be really close.I'm not sure if Kotal is exactly 5/5 across the board, but his variations are all very solid and very useful.
I actually think the opposite. I think kitana doesn't benefit from the variation system as much as some others, she has no variation with a good overhead. On the other hand mournful is good against certain match ups like ru kang she is still a zoner and spacing character in all three variations. With tanya she goes from zoner in pyro to footsies and 50/50 in DN, to pressure and chip in Kobu Jutsu. I think in some match ups pyro and DN can succeed where Kobu fails.Kitana can.
Lol at Tanya though. You will NEVER see someone "switch" from Kobu to DN/Pyro.
Never.