I'm pretty happy with our fairly simple chains & pillars solution for dealing with mineshafts inside the large 1.18 caves. We didn't really have bandwidth to completely revamp these structures, but needed to do something at least. http://pbs.twimg.com/media/FEfD_vyVgAw6HI_.jpg
@Drew_R_T No, because we have the same problem with rivers running through deserts. Would need to create a warm river biome or something and we just ran out of time for this update. Maybe in the future :)
@TheR3dVelveteer Yeah in our first iteration we had just pillars, but they got way too long. So we added the logic that it places chains or pillars depending on if the floor is closer or the ceiling is closer. And there is also a max length limit for chains and pillars.