Each of the strongholds available is neat and has great unique qualities (having been involved with four of them now).
That said, each character/group who has taken over these places seems to give it their own interesting spin. I think permanent placables near the entrance that allowed the Owner to set an area description would be a valuable addition.
E.g.
"You enter the Fruitpicker's Guild and are immediately struck by a pungent scent. The whole place reaks of the combination of rot and sweetness. Each step you take feels sticky."
This is probably easiest as a "glowing" placable, but a combat log text messages also works - akin to how you get updates about planar sickness.
Good idea. I would also suguest that you are able to "rename" the building. So that the FruitpickerĀ“s guild, could rename their house to "The glorious guild of fruitpickers"