Just adding my 2cents here:
1. the face does look a little underdefined (as kahnawake said), but not too underdefined. I wouldn't go overboard repainting anything, just try adding some highlights to the raised portions (nose, brows, cheekbones, etc) and see how it looks.
2. Was the staff supposed to be straight? It seemed natural to me the way it was (like a gnarlwood elm, or perhaps the haft of a scythe). I wouldn't have thought to straighten it myself.
3. cleaning/sanding moldlines on a painted model may seem intimidating, and I wouldn't recommend it
Fortunately, there is often an easier way to go about things: Many times the moldlines only stand out because the wash collects in the recess of the moldline. If you simply paint over the moldline with the base color (e.g., the white of the horns) then the "shadow" of the wash in the recess won't stand out, and the moldlines will be more or less invisible from tabletop distance.
- Adi.