I've got "Defend the Fort!" mission this weekend and must admit it seems quite underdeveloped.
I do like the idea, it's supposed to be fun to play but it is not at the moment and the fort itself is a biggest problem here. Map design, I mean. This fort is sucks in many aspects. It's hard to shoot from, it's easy to get shot while you trying to, it's suicidely dangerous just to move inside it.
Initial placement sucks the most. You are under fire already, standing on a position you should not be, and it's not your fault, its just starting placement. As result it's you who seems to be ambushed, not defending the fortified position.
Yet the only you actually need to do to defend the fort - is stand on a single chock point with a spear and press end turn button untill enemy go mad, your gals go mad, you go mad and finally come to conclusion that 100 infame penalty is a tiny price to pay and happily evade all of this.
At the end current fort is just visually ugly. While the game engine actually quite capable with recreation trace italienne bastion fortification in its general principle. Even the "Isolated Valley" temple do the job to extent.
Less significant issue is craft inventory availability. Looks it's not available. In other missions you retain your inventory stored in a starting area and I see no reason why this one should be an exception. Even if you will not able to evacuate your stuff in emergency you still shall be able to deliver it to the site by the craft you arrive on.