I don't really see the improvement. In fact, I think the modifications make the figure look worse. That piece that flips out of the arm and becomes the "mudflap" to the truck tires looks less integrated now that there's a round hinge. In robot mode, that same piece used to be very well integrated into Prime's arm. Now, there's arm kibble. The new upper arms add to a more bumpy and less-smooth rear to the truck. The smokestacks are fatter than MP-10...but what's the point? It already looks fine with its existing smokestacks.