On one hand, this feature seems very interesting and plausible (otherwise, how do you explain a "stable" that's half the size of a castle?), but on the other hand, I look at the screenshot and shudder – they've already taken up half of the usable area with decorations, and now the city takes up a lot of space.
No, I also really like all these beautiful frills, but we shouldn't forget about functionality – they could have placed an extra couple of mines or a hidden stash with a bunch of artifacts and resources...
🏹🎪+⛓️♿=💕