If you looking for portraits with wide open diaphragm, Zeiss is problematic.
At f2 it is sharp enough for portraits. Personally, I see no reason to pay more for 50/2 or much more for 50L.
It takes time to learn how to focus with 50 1.4 T*, but once you get to know this lens it is very liberating.
Not so heavy lens and you don't waste time with AF point selection anymore.
But I would not recommend Zeiss for non-FF camera.
If you take important portrait, why guff around with large apertures. Take classic approach, choose background and light wisely and use f5.6-f8. You'll have no problem with MF then.