Tabula Rasa (before it was announced to close), but it's just one of those things where the explanation would not make much sense unless you've frustrated yourself with it firsthand. It was complicated, time consuming and you would only need to kill 3 or 4 more Bane to get a better item anyway. Yet in Deployment 13, the crafting system was completely overhauled, simplified, and caused players to actually craft again. But was it just too late?
Over at Van Hemlock's blog, he takes a practical look at the past and present of TR crafting, explaining what we once dealt with versus the new and improved system. For anyone who has simply ignored the crafting in TR based on previous bad experiences, this post if worth a read.