Afk players in ranked

I think it's great that riot has made the remake system, and it's a way for the players on the team of the dc or afk to not get punished, but the remake system is only for the first 3 minutes. If someone leaves mid-game there's no way to win a 4v5 unless your team is insanely ahead. The team with the afk shouldn't get punished by the afk. Riot should give the afk team a loss prevention only if they lose, and give the regular loss of LP regardless if the won or not. They need people to review the game in order to decide if they abused the player away, or if the afk simply went afk for what known reason. Some people might abuse this system, so say the dc has to be dc for more than 5 minutes in order for them to be completely considered afk by this system. Riot, look at how other games treat afk and dc, and the team with the afk.