Currently, there is no best in slot gear for battle classes that is crafted. Granted, HQ heavy darksteel items full of materia are marginally better than similiar dark light items. However. Darksteel items are Much Much harder and more expensive to produce. Then on top of that there is drops from bahamut's coil that are better than darksteel. Because of this, many people, like myself, feel that the time and effort we spent on crafting and gathering wasnt worth the rewards
Now I also understand the other point of view."If someone could buy the best gear, then many people will just buy Gil from gilsellers to buy gear." And "if people can buy the best gear, what's the point of farming dungeons?"
I believe that the problem is that the best in slot gear is only obtained from one form of content. If all of the BIS gear comes from one source of content, then all other content becomes marginalized. I believe that in order to obtain the BIS gear, one should have to participate in multiple different contents, instead of spamming the same dungeon over and over.
For example, the BIS gear for a blm would come be:
Main: Relic obtained from a long quest
Body: obtained from tomes
Pants: bought with GC seals
Belt: crafted with materia
Ring: dropped from a primal
And so on. This would provide an incentive to actually use all the major forms of content in this game.