About the design.
<.< >.>
There is preference of style/design from each person. Currently, I don't like how the design came out, but it could be my preference...
Too plain and basic for my liking.

SHAPE
I really don't like how the sleeve's shape goes. It looks stiff and as if the hand got all swollen or all muscle up. :/
Remember gravity.
When you draw a loose fabric, the top part of the shape is close to the avatar base. Only add thickness beneath the avatar arms if it drapes/drops over.
The avatar right hand sleeve looks tighter but the avatar left hand sleeve looks... bulky.