I don't see the harm in removing the metals used in anything that isn't really an alloy anyway, which is everything except bronze and steel. Since bronze bars are easier by default and a single ore, it is unaffected either way.

The "Pure" metals such as silver gold platinum and mithril should never have been changed into alloys (only mithril was changed, used to be pure). Adamantium I do not know if is a fictional alloy or pure metal. Stick with whatever its' fictional history says it is.

Steel can remain the dual resource it currently is.

I would NOT rename copper and tin ore. Instead, add some text to the ore which says "This ore can be smelted into Bronze bars." Bronze ore sounds, well, stupid.