Eventually they do, but the Rogue is in between. Maybe the Rogue should be buffed? And moved into the Ancient Era?
Rogues are key early units and very important to prehistoric strategy (especially if there are a lot of Neanderthals around). I definitely don't like the idea of moving them. If the ambusher gets a first strike the rogue does not get, and comes later, then surely rogues should upgrade to ambushers rather than the other way around?