I don’t like this idea.
I think modifying the other values is better because I like the idea that there is some T3 Building set that doesn’t require a furnace, which black ice does not. However, I’m totally in favor of anything that makes Stone Buildings more viable on PvP servers where most people build out of Black Ice because of ease of access…
That said, with the new server consolidation, black ice might become more of a commodity since more people will be sharing the same limited Black Ice nodes.