The Materia system has wiped out pretty much everything content. Darkhold, most of the Ifrit Weapons, and most of the Stronghold rewards are useless comapred to it.
The only way to make it all balanced and even out is quite obvious.
Make ALL bosses drop materials, absolutely no dropped U/U gear. Give the material to a crafter, and have them make the gear. When made the gear is still not U/U. They can then put materia into the gear making it even better.
The crafter can then trade it back to the user. When they equip the gear it then becomes bound to them and becomes U/U.
This way, there is a reason to repeat dungeons and primal fights more than once, crafters are still getting work, and content gear isn't rendered completely useless.
My two Red Wizard gil's is less than 2 gils of Gath.