I suggest having some crafted items that are able to have their stats and lvl requirement boosted by "re-crafting". For example, the demonic sets are incredibly cool looking, and it is unfortunate that most end game players only got to wear it for 3 months before upgrading to Mt Fang gear (which IMO is not as eye-pleasing). So maybe there could be an option to further upgrade the demonic armor to lvl 65 or 70 using the existing crafting system. I don't think all crafted gear would have to be upgradable, just some of the more popular sets.