Why not make it so people can craft at the beginning of a dungeon, if the party isn't full. If it's full, obviously no one should be crafting, but it would help if more people used the join party in progress feature. Right now it's a pain because not everyone uses it. This causes more wait time for people in the dungeon.

If it was on by default, it would help those of us who use it, while those who don't know it's there will either start asking questions or they won't mind. I know I love joining a party at the end of AK, for a quick bunch of myth tomes, but that is still the luck of the draw.