Will reserve judgment until I actually see the improvements... I have both the Takara and Hasbro MP-10's... do I need a minor update? Nope... Red Alert was different... passed on Sideswipe, though.
"I am not a gun. I'm hitting people with a hammer. On Mars."
The Iron Giant / David Wildgoose
I wouldn't be surprised if it was a complete redesign. The fact is that MP-10 is getting close to being a 7 year old figure now and as people have noted, there is a clear engineering gap between MP-10 and MP-36. I wouldn't be surprised if this was the design team trying to bring Optimus Prime up to the same standard as Megatron.
Couple of prototype shots from Figure King No. 244: