Change FF for all 5 at 11 min, 4 of 5 at 14 min, and 3 of 5 at 20 min.
If the game is going to creep in snowball, might as well let the losing players leave the games they know they're not gonna win.
Also, the ability for 2 players to stop all 5 from quitting past 20 min is pretty outdated considering most solo queue stomps are done by 10-13 min in.
By that time, if you're losing hard, most of the people left in this community start whining, bitching and flat out giving up. I'm usually 1 of the 2 not wanting to quit, but even I'm starting to acknowledge it doesn't matter that you CAN come back because 9-10 times the other 3 players have 0 interest in trying that hard. This applies to Rank and Norms