Two big changes:

1) There's no longer any limit on # of squads per room in a mine or stronghold.

2) The costs to establish a mine on a lode are now scaled to the remaining % of the lode, so if a lode is 80% mined out, it will only cost you 20% of the normal cost to build it.

Penned by My hand on the 16th of Chronos, in the year 689 AF.