Ranked System fixes
Riot, I've played the game for about a year and a half now, but I've gotten deep enough into league to know about how changes affect all players including pros. The ranked system you have designed is actually broken. With your win/loss system it punishes players who do well but can't get good teams and awards players who are bad but get good teams. It's everyday I keep cycling through bronze 3 and 2 because of getting bad teams and doing well, but still getting punished.
For starters, the current ranked system isn't holding out well reward and punishing the wrong players. For every game played 5 people gain lp and 5 people lose lp. No matter how randomly someone gets put on a win/lose team something will be clear in the ranked system, when someone goes up a lot, someone else must be going down a lot. Just because a player doesn't play every game against the same person doesn't mean that he can't go down. This is how the game is balanced so that there aren't a lot of bad players in high ties. But this also punishes the wrong players.
Now if we look at a more standard way of doing ranked that makes more sense, we might base the lp gain/ loss mainly and score( kills + assists/ deaths) and cs with a win or loss having a little affect. This system awards good players and punishes bad players. As well even if you lose a game you don't have to lose lp. For example, if someone does bad but is on the winning team he might still lose lp or not gain any, or if someone on the losing team does well he might gain lp. This system would also get rid of some unsportsmanlike behavior, since if you could do well you might not lose lp and mistakes of teammates won't be flamed. I understand that the whole win/loss system is more focused towards teamwork, but that is more for ranked teams, we are in SOLO que after all.
Just because the current system is decent doesn't mean it has no flaws. One thing is that when you get say 18 lp after you go up a division and then you lose a game and drop back to 0 it counts as dropping to 0 lp in a division and your next loss demotes you. It isn't fair and I keep getting stuck in bronze 2 and 3 from it. As well you shouldn't have games where someone on your team intentionally feeds or afks you shouldn't lose lp for a game and the player who does afk or feed needs to get punished. I get those players all the time and i lose lp, but then I report them and they don't even get punished. If we want the current system to work a little bit we would need these changes.
Right now since we just started a new ranked season it's not the best time to change the ranked system, but next season could you please think about changing this because the ranked system doesn't work.