As I look over the changes for the new version, a few things stand out to me as problematic or question provoking. I for one wonder how far adventure skills will let us go, will we basically be able to found our own fortress? Or will we more just build little buildings and compounds? But these aren't really issues for now.
What is an issue, at least as I see it, is the interactions with the new materials, especially regarding weapons and armor. Now, one of those things redded out on the list is this:
Item/attacking part damage
Now that could mean many things but considering the nature of the new materials, how things like the ability to hold an edge and potential brittleness determine damage, I will assume it means that weapons will degrade as they are used over time. It makes sense for your sword to lose it's edge after cleaving through the heads of countless children but this raises a big question: How will adventurers compensate? In fortress mode it's easy to just add a new "sharpen" or "repair" job for the weaponsmith, but it may be more difficult in adventure mode. Will we be given the skills to repair our own weapons? Will we have to bring them to a blacksmith? It would be frankly tragic if our beloved weapons were to shatter and dull without any hope of fixing them.
Perhaps, also, named weapons of a certain caliber and artifacts shouldn't succumb to this. It would be odd to find out that the "fate of cheese" the legendary war ax which was wielded by countless Kings is nothing but a rusted chunk of dull metal. Thats another thing as well, how would we see what the status of our weapons and armor is?
Discuss the issues you foresee and offer your solutions, who knows, maybe toady will find one of them useful.