Not necessary on that scale, but i think it would be nice to have some attacks.
I noticed that in the outside area of the HQ, there are some patrol of green npc that appear, walk through the map and leave.
It could be nice to have sometimes, hostile enemies spawning with the same intent. Of course, the guard would make short work of them, but it would increase the feeling that the outside world is not safe and that the HQ should be protected everyday. Now, it feels like the guard do nothing, because there is nothing to protect from.