Hello,
as someone who has had (almost) all jobs to max level for a while now I want to make the following suggetion:
Currently several challenges offer both (a pity amount of) gil and experience as reward. Once you hit max level (or complete those tasks as a class of max level), you'll miss out on the exp-reward and be left with an amount of gil that allows me to teleport from my doorstep in the Goblet to the Namazu. Once.
Or in other words: Completing those challenges as level 70 character isnt worth it. But some people might still like to do that - either because they dont even have a job that can get the exp (like me) or because they have no intrest in leveling anymore classes.
Thats why I would propose to do something similar to how the roulettes handle those rewards: Replace the exp with tomestones/scrips/crystals when the challenge is completed by a max level character - I would imagine it would also feel like less of a waste for people who do that by accident if they get at least something out of it.
My suggestion would be as follows:
Dungeons - Creation-Tomestones (aka the current uncapped ones) or, if they dont want to change that all the time: Poetics (since they dont seem to be going anywhere)
Guildhests - GC-Seals
FATEs - GC-Seals
Leves - GC-Seals
Crafting - Red Crafting Scrips (assuming, that red scrips are going to work like poetics - aka being the scrips that will stay)
Gathering - Red Gathering Scrips
Chocobo - ??? Maybe Hunting Seals? (I'm trying to keep it to currency mostly)
Commendation - Tomestones (...why are they even a thing in the challenge log?!)
Eureka - Anemos Crystals
I'll be so honest and admit that it was actually Eureka that insipred me to make this suggestion - I couldnt stand to go in there pre-challenge log, but now, with the challenge log, I'm approaching level 20 and actually felt a decent sense of progress by killing the requested number of mobs.
And it got me thinking - the challenge log seems to be there to help people who are progressing (slowly). But we all know that progression doesnt stop at max level! Why should the log stop to be useful beyond recruits appearing in your base and covering not even a fraction of your normal teleport fees? There is stuff, mostly currency, in the game thats useful for max-level progression - the roulettes are already adjusting to that! Why should the challenge log?