As for the FC airship stuff, I've never seen an airship on my server's marketboard besides the Tiny Bronco, and those are normally listed for well over material price. They usually don't even have all four pieces listed at once.
Then you didn't read what was said.

Current step asks for Varnish x12? Go on MB, buy Varnish x12.

An FC with every craft except armorer can't turn-in darksteel plate, and thus can't finish their airships, even if they have all the darksteel they need from the marketboard. It's not like crafters are being cheated if that restriction is removed, because SOMEONE on the server crafted that darksteel plate.
How about buying that darksteel plate??