Having his bicep rotate and shift seems a bit strange, seems like his arm is wiggling around in his sleeve could just be due to the clothing not moving yet. (unless your planning for like clothing upgrades along the way)
His right thigh (our left) seems like it should move forwards, having it pull back like that seems a bit strange as well.
Might help if you make the leg get bigger instead of smaller, like the knee is bending towards us and then foreshortening.
Also I'd probably put the belt behind his forearm arm, seems odd to hold it behind the strap.
Though that could just be a layering issue, may have to make the forearm a different layer.
Looking good.
