Please address 4v5s already
If someone DCs and has been disconnected for a total of 5 minutes or more throughout the whole game you don't lose any LP. If you don't want to do that at least make it so you only lose 50% LP. Adding the 5 minute requirement to this would make it so nobody could just afk at the last minute in a losing game and save the team some points. If you are in a series the game does not count as a win or loss.
If there is a player that does not connect within the first 5 minutes of the game you are free to leave without losing any LP or a series game. Adding the 5 minutes would make it so if a player actually is having trouble connecting they still have plenty of time to reconnect before the time limit is met.
If a player is DCed for a total of 7 minutes or more and you are able to win the game then you get bonus LP or an extra win in promos. The same principle is used for the 7 minute requirement so it is not abusable.
Since this would be kinda lame for the team with 5 players on it maybe they could get some partial LP or something.