Someone posted an image with a hypothetical breakdown of damage dealt to the safe in heist at the end of the match so you can see who contributed what. This is a great idea but i would take it one step further. Stats and performance during a match should affect the rewards you get from each match.

Stats should dynamically affect the number of experience points and keys gained. Someone who stays in a bush and does 100 damage and gets 1 kill in showdown should get proportionally less than someone who gets 7 kills and did 20-30k damage. This would inspire more competitive play and would be another way to get rid of teaming.

Gem mode: max number of gems held and duration of time gems held.

Bounty: Damage Dealt, Kills and number of stars earned

Brawl Ball: Goals Scored and Damage Dealt

Showdown: Damage Dealt and Kills

Heist: Damage to Safe - Damage dealt to players