Search seems borked right now, so I don't know if this has been mentioned, but I think we should have the ability to buy and use consumable favor items so we have a use for all those extra favor points we will be earning once we've purchased all the items we want to use.
I wouldn't mind a second favor slot for these items, as long as they too are limited to one per game. Because of the nature of these items I think it would be cool if they were all extremely over powered, although single use.