I don't like the idea of removing gathering as an option from citizen soldiers, its one of those mechanics that feels unique to 0 AD and keeps it apart from Age of Empires. Not to mention is a lot more engaging.
There is already an eco differential based on movement speed of ranged units, archers are slowest and skirmishers fastest.
The speed of the ladies is consistent, and the distinctions are such that they farm better, chop wood at roughly the same rate as the men, and are half as good at mining as the latter. Its entirely intuitive as to who will do what in any given match
Seems reasonable enough as it stands, why is it necessary to break and recreate the system?