To me i don't see how the newer leg placement is better balanced than the first. In fact it seems less so. I can see the guy about to put his foot down on the first two, therefore the balance problem seems less significant. However on the latest placement he can hardly put his foot down quickly to steady himself, since he is leaning so close to the ground. Would look better in a scene methinks, where he's ducking behind some cover about to grab his gun or somethin' - on it's own it seems a bit off i think, and i prefer the first.
My thoughts.
Brilliant work nevertheless, i love the design.