You should be able to surrender 90 seconds after someone disconnects
Just had a game where my pantheon jungle tower dived with me at lv4, the orianna died again (earlier died to me), his passive blocked the turret shot which would have killed him. She rage quit.
This was at around 5:00 into the game. Does the other team really need to waste 15 minutes slowly losing by more and more due to an afk, just to forfeit later?? Such a waste of time and so demoralizing for everyone with the afk.
I propose that after 90 seconds of someone disconnecting (since you don't want someone to legit dc, then try to come back 30s later to find the game is forfeited already), regardless of the time in the game, you can unanimously vote to surrender. Still counts as a loss, still penalizes the afk person. Just saves some time and moral for everyone involved