OK, so:
- No ab articulation
- Shoulders don't extend
Those are both confirmed, now for the thing I need clarifying - does this figure at least have a waist swivel? I've found the Mk II AU gets by just fine by virtue of having one, even without the ab extension and ribcage joint.
I do feel as great as this figure looks, the price:diecast content:articulation ratio's poor. The metal content I can let slide but the lack of shoulder barrel joints might actually be a deal breaker if it doesn't at least swivel at the waist.