I was actually hoping the upgrading Quest for Relic would have been a bit more unique after Zenith but guess we just have to wait for those drop rate the increase over time.
When I mean more unique I mean like a side story quest chain saga for each time you upgrade your Relic the quest chain would be a side-story covering deeper lore of your Relic and your Job relation to that relic other than the original owner. Maybe even throw in a Solo boss fight at the end of the Relic Quest as the quest way to test if you are worthy to handle greater power by fighting illusion copies of former legends in Eorzea that were once your character's Job.
Farming pieces that depend on RNG was the last thing I wanted but what is done is done until they start buffing the rate it in 2.3 or 2.4. I kind of have a bad history with RNG required task to obtain legendary weapons.