They made such a big deal about how Skyhold could and would change through the game depending on your choices, and so far for me, its minimal as was said. Holes and rubble, and the dungeon in the basement is in total ruin. Of course, I haven't had a single opprotunity to throw anyone into it either, which I thought that we would as well.
The dungeon makes sense though, when you first go in there if you co through the second door a codex pops up from your construction workers saying that the foundation is cracking and they highly suggest making no changes to it or the whole thing could crumble in. Also if you judge people to go to jail they should go there (I think, I've never done it so I could be wrong).
Ya I thought Skyhold would update after each main story mission but it doesn't, just after the 3 major ones. The thing that annoys me though is the hallway to the war room, I do like though that there's banter referencing it. Josie talks about how cold it is, and Cullen says it's annoying when the wind blows making everything scatter