I would welcome a blind auction house like what was in FFXI where people didn't know how much gil stuff was in for, but unfortunately I don't think that will effect the undercutting. People will still undercut, maybe even more, if they don't know the prices that are in there at the moment. More recipes, more levels, and only allowing one of your crafts to that level (which is something FFXI did) was very good. I have a hard time believing that they won't implement this in the future.

As more and more expansions and updates come out with more crafting recipes this should eventually happen. Expansion comes out, some hard mob with a low drop is introduced, and you take that said drop and craft a weapon with it and then sell that weapon for a premium. This can easily happen, and I only hope that Yoshi-P is well aware of the things that FFXI did do right, and introduce them accordingly.