they probably need to revert this. I understand the idea, but its really not needed. The material is already hard capped by the metal you need to access it. Iron Sledge is an iron tier weapon and needing to beat bonemass to access an iron tier weapon is counter-intuitive.
Same with the Frostner. You should be awarded with Frostner if you take the time to go into the mountains and get silver so you can use frostner on bonemass. I enjoyed doing that as a counter to the typical gameplay you do.

When they get the game all patched up, someone will make a mod undoing this silly change. Still understand that this is a test bed. So if you are a dev reading this. Consider using the boss stuff to lock progress with certain access to the metals needed to craft; and not the trader as the trader items can be used by clever players to help with bosses.