Finally got ML Prototype Arcee with my POL; as my first foray into Missing Link, I don't feel like her transformation is overly inauthentic, especially for a design that never actually transformed before. I need to get the rest of my movie-era figures out and do some group photos.
I will say, I think I would have preferred the white and pink color of the toon version, but I definitely believe the head sculpt of the prototype version is closer to what we would have gotten back in the day. If they had offered a prototype head with the toon coloring, I think that would have hit my sweet spot just a little closer. As it is, if they retooled this figure to be a Rebirth-accurate Headmaster in toon colors, I might be tempted to double-dip if the price wasn't outrageous...