Yeah I can't say that I much like the pose either, unfortunately. The way the arms are swept backwards like that with the weapons make little sense, and just looks totally at odds with the rest of the pose/sculpt. And yeah, the omniblade does look very cheap and plasticy too. Shame, because everything else is so damn good.
Out of all the possible poses they could choose, they go, yep, the one with the awkward looking arms and oddly held weapons, that's the one we want...Sideshow just mystifies me sometimes, they really do.