Les développeurs ont dit lors de la « early access » : « We did rework the grouping mechanics for Rome which is why they’re still a little broken. The new system is based on a more defined hierarchy which allows you to pull out subgroups and also merge groups together.
Our plan with Rome is that issuing a single click move order to multiple units will cause them to move independently and cluster around the target point, where as holding down the right-mouse button over the target will allow you auto-group the units into a formation. »
Ensuite, il y a aussi les améliorations graphiques (arbres, bâtiments, variétés de terrain, ..), le micro-management, etc ..