General Discussion is the perfect place for things such as profession and crafting mechanics right now, as we know very little about them. I'm sure once gameplay testing reaches a point that it is no longer under NDA there will be more specific forum sections opened for feedback on crafting, combat, etc.
As Tani says, if you want to find like-minded individuals check out your server's forum section; every man and his dog has set up their own organisation at this point so if you can't find one for crafting discussion something has gone very wrong. :D