I like it, but I would say for the sake of gameplay that it needs to at least be possible to get to the walls with enough men to take the castle, else it would be now fun to assault.
Well, I think Jubal is probably right that it will be possible simply because we are human and they are AI. However I will be sure to test the battle and make sure it is not to difficult.
It is still a ways from completion, so far there is no AI mesh and the area to the right of the gate is not player friendly, there are odd invisible walls that I am fighting to get rid of.
Other than that I am just trying to "pretty it up"
Also, if it is to hard to get through the gates that is easy to fix. Just move the spawn point closer.