There are many pathing issues such as this that I find hard to believe were not known before release.
Another is the simply pathetic pursuit abilities of cavalry against routing infantry. I thought M2TW was bad -but ETW is worse. When the "Victory - end battle/continue" screen comes up I always click OK as it is just too aggravating to waste my time trying to get a unit of 40 cav. to hunt down about 20 routing inf. successfully.
Bookmarks