I noticed the hillock, in which I started, changed twice. Mostly by shifting occupants of the mounds from some mounds to another ones and by changing places for furniture.
The local fortress changed 3 times its armory. The remote other Dwarven fortress changed once its armory. Both Main-Halls of human civs didn't change their armories even a tiniest thing. Mostly during 1st month of adventure, when I wasn't putting in them loot from dark fortress.
At local fortress I noticed only 2 major events. There was taking place insurrection from the very start of the game, which was waited through by ruler, though they got new goblin mayor from what I noticed. Second major event was, when I came from the other Dwarven fortress to local fortress and I had some "n" nightmare monster trailing me, as I passed by its lair. I didn't even notice, but seeing dead bodies everywhere and blood I started tracing it down and I found monster just few hits from dying right at front of me. The other, remote fortress had some trolls and beak-dogs roaming free inside, which turned hostile to all Dwarves upon my arrival. Also I found some even more trolls and beak-dogs later, when layout shifted to allow entrance to the hidden parts of living room-industry fortress. Also few bodies of Dwarves too, sadly.
Also layout of both fortress in living room-industry kept shifting constantly until it stopped rapidly in 2nd month.
For last 3 months I can't also find remote fortresses tavern keeper. Though he is on payroll and manager of the fortress's tavern. I believe he got vanquished from game, when part of this fortress industry-sleeping rooms layer shifted around. So he will stay hidden in game, until the layout shifts again and he will be allowed to return into tavern.
So yeah, I did ask about frequency and triggers for all those changes of layouts and armory refreshes for a reason. I am missing one tavern keeper and hoping for those 2 useful musical instruments to re-spawn in armory really.
Though now this refresh issue is pointless for me, as I did run myself into camp crashing constantly with segmentation fault, because either too many animals in grid or maybe there are too many faulty animal pathing around there. Tree top teleportations for non-birds I have seen in this adventure too.
So game is generally fine (except those 10000 trolls constantly rushing from their troll's pit, through prisons, into spire in Dark Fortresses), but it seems somehow I managed to stumble on all those hard to detect bugs and major bugs, which make Adventure Mode practically unplayable. Though if those animal spawns in lairs and camps got under control... this adventure could still continue really. As state of this adventure of mine is, the Adventure Mode, is simply too bugged to keep even playing. I won't spend another whole month skilling another hero in all his skills to legendary to just re-discover all those nasty bugs. Though learning tricks to armory refreshes could be useful, because it does happen. Maybe to continue with this one later on, or a new one much much later on.