The seasonal effects for 4TPY have been properly added and also overhauled in the upcoming update. Chances look solid that we will be returning to 4TPY in the main version and release 2TPY as submod.
@Plush_Salmon
I've lowered movement ranges already by 15% for this update, may need to lower them a bit more. Roads now strictly increase movement range on the road itself, as opposed to the entire traversable area. Technologies should also be adjusted, being somewhat slower to research (as a compensation, libraries have been made more powerful).