Mystictic... I will doubt the person's eye IF they can't get it right with my zooooooooooom in picture. It is so big already!

As for the logic of the curve.
Notice I didn't ask you to change anything on the avatar's right arm? Cause I figure that is better shape and the curve at the end of the sleeve looks good too. However, the right arm is in side view, but the left arm is in quarter view, their curve would be different.

Normally, curving in the U or slanting inward like your black shirt sleeve is fine. But your right arm side view sleeve end do not suggest that simple straight cut. The way you curve the sleeve end on the right wrist, it looks like the sleeve end is a bit looser and spread out a little bit, that is a spread out cut. But the arm we fixed, it WAS a straight cut. What I am suggesting is just matching up both sleeve, and I choose the non-straight cut.

Compare to old and fixed version, did you see that in the fixed version, the sleeve ends seems to spread out because it is hugging the top of the hand?