Posted elsewhere on this, but I played a couple games with expanded castles on before I got frustrated with them and turned them off. Herbalist is enormously frustrating when you've already attacked and wounded/ killed most troops but don't have the numbers to take the city in that turn. (Combined with defender withdrawal there were a couple times I wanted to throw something.) My wounded troops could easily finish off their remaining wounded next turn with little or no loss, but suddenly they have a full health unit that I'm going to need to sacrifice a couple wounded troops to finish off. Also had same issues as already mentioned by others with gatehouse.