How about instead of adding a surrender @ 15 minutes, you fix the game?
15 minutes surrender vote must be put because games snowball so hard.
Thunderlords & everyone one shotting each other is making this game a pure mess. Put the game back season 2 style, where 1 shot wasn't a thing. Where you actually had to work to kill someone, and someone bursting you for 2 seconds was called a delete, not S7 0.21 second burst.