I've just installed this and I must say that I have exactly the same thing. seems to be the quietest most boring game ever:hmmm: The diplomacy AI is great though . I took the descr_strat file and put it where its supposed to go, overwrote the other. Dunno if i've done something wrong but i'm quite disappointed.
Also, I had the issue when, while being attacked by defenders (sallying out) while laying siege to an enemy settlement, the AI General did not move from the square, when his army routed their own gates would not open for them, and my cavalry would not enter the city. Back on the first page it is mentioned to delete descr_pathfinding.db in the data folder of Retrofit, but I started the campaign without this file anyway (it was not there on installation). I have deleted it again after it regenerated but it hasn't done anything to fix the issue.