I've been going back and completing these old relics and i think there could be a few things that were missed when making them simpler,

First is Bombard Core, these beauties are still 20,000 grand company seals a pop, you require 4 to complete each of the 4 quests to go from nexus to zodiac weapon and that's 80,000 seals. i know seals are not too hard to come by but as a max rank my grand company cap is 80,000 and that just seems like a little too high a price.

Second would be the Aged items required for same step, not sure if they can be put somewhere or maybe make the items you desynthe to get them desynthable at level 1.

The final thing that might just be a help to people who have played a lot but the Sphere Scroll phase of the relic i would be nice if we could do away with the tier system and let us throw in any grade of materia to progress the stat. yes i know low grade materia is not hard to get and it would just be nice if i could use my stacks of grade 4s and 5s in it