I may not agree with the philosophy, but I think I need to accept that Square has decided that top gear should not be available for purchase, apparently due to RMT concerns. With that in mind, I'd like to collect suggestions for ways to make end game crafting much more relevant aside from adding ilvl80+ recipes (furniture and other vanity crafts most certainly don't count in my book!).
1. As many have suggested, craft-requests similar to the current meld requests, where one or more of the crafting materials are drops from high-end content. Separate rewards should be set for NQ and HQ outcomes.
2. Borrowing from the Relic quest, let crafters create unfinished items. This already happens to some extent in the relic quest for weapons, and could be done directly for other slots without adding full quest content. Unfinished items should be 2 star (or above?) and require drops appropriate to the end result ilvl.The end user can finish the item themselves (like trading to the forge for the relic zenith).
3. Make current high end gear singly meldable, but only by tier V materia. Tier V materia would of course need to come from ilvl 70+ crafted gear, and IMO not 100% of the time. The materia need not surpass ilvl caps to be desirable, and create significant demand for high level convertible gear.