I think the main obstacle here (but keep in the mind this is just an assumption) is that true currency and items you can roll on seem to be placed in different frameworks. You were never able to roll on something that goes straight into the currency tab, and there's no signs that they would be able to make it so.

I'd guess that the workaround they could implement (if possible) would be an NPC to convert the tokens into currency, after you rolled on them in the duty. You'd still need inventory space to be able to get them though, just for a limited time.