I had this idea,
what if they added a progression system for each merc, going from level 0 to level 100. You gain levels for the played merc with the score you accumulate in matches.
The rewards wouldn’t be anything game changing and you don’t actually get them for each new level, but for every five new levels you could get some credits or cases. But at level 50, you could get a special trinket unique to that merc that you played thus far, and at level 100 you could get a special skin, which you can only get by maxing out a merc, with the loadout of your choosing for the merc you maxed.
I didn’t yet thought about the technical aspect of this idea, for example how long it would actually take to get to max level, but it would probably take a whole lot of time.