I'm rather worried about the future of forts - mainly from long-term point of view. For example trees growing inside walls are not the best idea if you want a wall to hold for centuries. I know Elves love trees (some even...well...you know...), but these are not very good for the stability of walls.
In fact all forts seem to be in a rather desperate condition (judging by various cracks, missing stones etc.). I wonder how long they'll last as the only parts which are constantly renewed are doors.