Like, something winning players can take into a new run, but the next run gets a bit harder?
For example: You win, each player in your party gets to pick from 3 rewards; they could be:
A level 300 weapon (Boosts the weapon you bring in to 300 instead of the default 250). This goes up with every lap completed (300/350/400/500).
A perk/trait to start with.
Or start with more Coins.
The rewards (and the difficulty) raise with every completed lap, until being lost upon losing.
Would make beating the Citadel more impactful. As it is, winning is literally no different from losing; there’s no ending either way, you keep 25% of your coins either way, and you earn nothing either way.