Kinda wish that the Iron Cheetah, or whatever its name will be, is actually pre-3050s design. EDIT yes, this would be a can of worms. No, i have no idea how to deal with stuff like that. Variants of existing mechs slot into "past" well enough, as seen with some of the new Thunderbolt variants.
Figured i need one more of those. Let's see, original 16, Shadow Cat, Ebon Jaguar, Grendel... Yeah, the Iron Cheetah would fit in nicely here.
(Other options, the Arctic Cheetah, Huntsman, Kingfisher, Crossbow, Battle Cobra, Coyotl, Lupus and Woodsman don't really interest me.)