I don't know how useful this would be, but I was thinking it might be cool on some of the "rest" levels in the Clockworks like Manor House to have a randomized Consumables Vending Machines. These would dispense randomly(?) selected consumable potions/healing pills/robots for purchase via crowns. Maybe also you could sell matching consumables to the machine in turn, if you wish to return to Haven and have no need of those items you've collected. You tend to make crowns pretty fast, so that might be a non-issue, but as for buying consumables? I know I've only come across 1 Robot kit in my explorations, and it was pretty useful. And healing pills are always nice to have, so I'd buy them if they were available.
Although there are always issues of game balancing, I have to admit, this idea would be fun if implemented correctly. It could also lead to a new and major crown sink, which would help to drive the exchange by ensuring that even experienced players had something to spend crowns on regularly.
I'm not sure what prices would work. They'd probably have to be a bit high- say 1,000 for status vials, and 2,500+ for healing capsules of any flavor. This to ensure that vials were a momentary special bonus, not a game-breaking advantage.