Some more issues to report:
Cormanther always seems to start crashing to desktop after playing for a while, making them unplayable. It always happens at the end of the barbarians turn/start of my turn. The earliest it's happened to me was turn 58. Some times I can go back a few saves and the game will advance past the crash point but not always. I really tried to upload a save for you to look at but I couldn't even find the darn things. I really have no idea what's causing it, sorry. (This also happened to me with Algorond but much later in the game.)
The magic victory type really does seem to be bugged. I've been able to to get it only once in one of my several play throughs and it can be triggered right at the start of the game using the Ingame Editor mod, but most of the the time it doesn't trigger when I get the four schools of magic completed and 1800 weave. Sometimes I might have been beaten to it by another civilization that didn't beat the mobs that appear, so that could be part of it, but I know with certainty that I was way ahead in spells unlocked in one of my games and it just didn't trigger.
Having dwarves being able to cross mountains seems nice but mostly just results in dead dwarves when auto pathing. I'd just as soon have you remove it, though I suppose you could leave it in and not have it do damage to the units.
The free zombies that Many Arrows get are kind of out of control. In one game I played as another civilization Many Arrows had at least 150 of them just standing around clogging up their entire territory.
In regards to caravans making roads, I'm glad that you are planning to make it an option that can be turned off in games that you setup. What about the scenarios though? I'd appreciate it if you'd turn it off in those too.
Thanks again, hope my notes were helpful.