Bronze is overtuned compared to wrought iron gear because bronze used to be hard to make good quality. But with how common tin/copper is in this progression system, bronze gear demolishes anything that could be made out of wrought easily. Also, because wrought gear is so mediocre, everyone skips past it to steel gear anyway.
Suggested changes to give us a proper iron age in L4:
Nerf bronze gear
Buff wrought gear
or (personal preference)
Make steel crucibles require *something* that restricts them to a deeper level. Sunstone? Special coal? Jorb's mushroom farts? Take your pick.
Change recipes that being locked behind steel would be a bit annoying to wrought (coin press? bwall? not that bwall makes much sense in current siege meta)
Opinions?