I did like it.
But theres things that annoy me like the investment part. Is it good just for 1 fight or they become better each time, and if they improve, in which way? they atack faster or make stronger hits...?
At some point the infantry, horses and rams are killed before getting to the castle which makes me think that they are a distraction for the archers to do their thing. Maybe its here where mass atack would be good but i doubt it.