Surrdenering before 20
I really am not going to let up on this.
It is not Riot's business to determine how long a person should decided to play before they think that forfeiting is the best option.
If 4 people decide that the chances of coming back are too slim compared to the amount of extra time to be invested that is their judgement call to make. If that happens to be 10 or 15 minutes, so be it.
Riot should stop micromanaging their players and let them decide how to best use their time.
We should be allowed to forfeit at 10 minutes. There is no good reason to not allow this.
EDIT: It doesn't matter if the game COULD be won. Its about, how many times in this situation will we have to win in order for this effort to be worth my time? Meaning, when its 20 to 3 in 15 minutes, sure you MIGHT be able to win. But you will probably get more LP in the long run by saving yourself the time and moving on because you know that MOST of the time you aren't going to be able to come back from that, based on the team comp or other factors besides the score. And if the rest of the team feels the same way, why should they not be allowed to surrender?