Looks pretty solid there.
Can you loosen up the arms area and bunch up that neck muffler at all? It doesn't quite seem baggy enough on both counts. It's a really flowing, loose fitting poncho oncrseen - this almost seems a bit too snug overall. Maybe you can pulls some from the back. Just like with ANH Leia it can be really hard to get enough volume and flowing aspect to fabric at this scale.
The SSC Zuckuss had issues on the coat where the sleeves were maybe half the diameter they needed to be. Hopefully this is a matter of futzing.
I agree with Wor-gar on the belt - it is indeed a web belt onscreen, but the buckle could use more detailing and the stuff SSC uses for web belts these days really feels like gift ribbon and is often too narrow (and they use it even where it shouldn't be used, like on Dengar's waist belt which isn't a web belt onscreen.)