Lower surrender time to 15 minutes
Let's be real here. Some games cannot be won. I don't care if you're Faker, if your bot lane goes 0-10 by 7 minutes it's gonna be impossible to come back and win against players who have some semblance of how to end games.
Many games feel lost (and are lost) by 10 minutes--sometimes even earlier. Towers are just too weak to do much against a snowballed team and in losing games I regularly get dove by multiple members while their lane counterparts on my team are pushed back under one of our towers.
Games are shorter as intended, so make the surrender vote available sooner. I've had too many "sit in base and wait for enemy to take inhibs and nexus. Venture out of base and die" games. You get to watch the inevitable unfold for 10 minutes as you sit there unable to retaliate. But you're almost coerced into attempting something due to fear of your account being banned, if it is only to get dove and killed yet again.
I've been on both sides of this. Even in games where I feel I outplayed my opponent and gained a nice lead for my team/lane, often opponents just /ff at 20 minutes. I've had several games recently where opponents just straight up afk'd after 2 deaths in lane. While I rather dislike this behavior, due to the increased snowball mechanics of the game, I honestly don't blame them for feeling hopeless.
TL:DR: Let us /ff at 15 minutes now that games are on average shorter. This should also help reduce toxicity from game-to-game for some players.