Obviously some people go 0/holyshit on things, but I don't think you can suggest the chances of actually obtaining an item you want from ??? Assault items are the least bit reasonable. My assault static spent a few months trying to farm a Divisor Ring, and barely ever saw any ??? rings, none of which appraised to a Divisor. Out of ~60 runs of Preemptive Strike, a different Assault group saw 1 Spectacles (and 0 Storm Torques).
In a few months (if that), my MMM group got 5 torques, 3 MMJ earrings, 3-4 sashes, 4 lyc. earrings, 2 polearms, a dagger, and 3+ Koggelmanders. Some people go 0/wtf on Salvage pieces, too. I don't think you can really use low drop rates as an indictment of any specific system in FFXI as opposed to the game as a whole.
It is a valid point that boss runs are (mostly) "all or nothing" as opposed to a buildup of tiny rewards along the way. Though many such rewards for other systems are diminished with the repetition necessary to get drops from them, or in other ways. Nyzul tokens are (mostly) for using in Nyzul. ABCs are a lot less now. Alexandrite is a few gil per run (I donate mine to my LS leader, who is doing Yagrush). I'm long since capped on ampoule items, and SE doesn't seem to want to add more. Dynamis currency is nice, for the person or LS bank getting it, but the zones where you get a lot less of it are more appealing for AF drops and everyone not killing themselves.
(You do get 200 exp per boss, and then a bunch more if you have a CC crate, which is I guess SOMETHING...not earth-shattering, but it helped cap my mule over time. You get a sad amount of marbles per boss run, too. It wouldn't kill them to increase that.)
I would love it if you could buy meaningful gear with marbles, even if it were Ex. Every system in the game has room for improvement, and this is another one.
XI Wiki


