@Riot: What if you implemented a "sit-out feature" for games that turn into a 4v5?

Let's say a player disconnects during a game. The game is now a 4v5. What if the team with five people, at that moment, were prompted to vote on one of them sitting out?? Each player on the team with five people could vote on which player they think should sit out until the disconnected person returns. When the allied teammate is sitting out, he'd be switched to a real-time spectator mode where he could only spectate his team. Once the disconnected player returns, the allied teammate is immediately loaded back in the game.

Allowing the team with five people to decide which one of them should sit out would still allow them to have a slight advantage because they could choose the weakest player on their team to sit out. This would also level the playing field for the team with four people because they wouldn't have that one extra champion roaming around the map or split pushing.

I know it's not a perfect idea, but I like the idea of giving a little mercy to the enemy team with four people without disbanding or throwing the game.

I thought of this when I thought of playing pickup basketball with some friends. If one of your friends got injured, then normally (if you're friends aren't egotistical dykes) someone on the other team would sit out to keep an even match. Why can't we do something similar on here?