Just got to my UW Dev today and I really like his combined mode. The single bot modes are ok (I like the face sculpts) but thing like Hook's crane and Mixmaster's backpack are really poor designs. I reckon Hook's crane would have benefited from an extra snap hinge about half way along. That way it could fold up in bot mode, and fold down onto the back of Devastator's shoulder when in combined mode.

Another thing on mine, were Scrapper's new hinged elbows. I put quite a lot of force into trying to unclip them, but they wouldn't budge even a little. It got to the point where I was putting enough pressure trying to release the clip, that the swivel joint plastic was actually bending (but luckily no stress marks.) So I gave up after that.