- If your winrate is over 50%, you lose automatically the next game
- If your winrate is under 50%, you win automatically the next game
- If your winrate is exactly 50%, RNG will decide whether you lose or not

The MM improvement does not solve the issue with too quick games. That is easy to solve. Make the reload time of each tank to 14 minutes. After that all battles will last the maximum time. That would also take care of balancing tanks as they would have equal reload time, plus every player would be able to shoot.
Of course there could be a reload booster for sale in hard cash which would provide significantly faster reload time, and it could be also bundled with win-rate booster for an ultimate booster pack and sold in casino loot boxes where you have 5% chance of winning a booster and 95% chance of winning some absolutely awesome and truly unique cosmetics that are guaranteed to match the colour of your lipstick
Special thanks to the kiddie casino host Cpl Derren for inspiration.
Good luck in the pixel casino,
Santeri
PS. Don't tell your Mom.