I love this guy, I think GW nailed him.
The tree-fella though doesn't work for me, the pose is off with regards to the wings. If they want the wings out then the pose needs to be more dynamic if not then the wings need to be tucked away. Winged creatures only get the wings out to fly, stretch or for display so having wings out while just resting a foot on a rock look off. Plus, wielding a glaive with wings out is a recipe for disaster. I also think combining a buckler with a glaive is daft, the two weapons just don't make any sense going together.
Having said all that I'm fairly sure such concerns could be sorted with conversion work.