The game should still punish/reward the same amount of LP as usual, but it should also take all of your performance (not just KDA but CS, champ damage, turret damage, dragon/baron damage, inhib damage, etc) into consideration and reward you SOME LP for doing well individually.
It's dumb that the game punishes you the same as the weakest potato on your team. You could do better than EVERYONE in the match (all 9 other people) and your weak link teammate throws late game and you lose... and you get the same exact punishment? Why?
I made a post about this already but it should be something like anywhere between 5-10 LP bonus depending on how well your individual score is.
So you are still encouraged to win because the old LP loss/gain is still there, but on top of that you get a bit more LP for doing well. Fair?
This would let people who are performing well as an individual to climb ranks faster... Which would put these people with other high performing individuals, and their teams would be better overall.
As of now it's like... you can be leagues better than your teammates but if one person on your team is a total newbie, then they are going to drag you down like a heavy anchor.
There's the old saying that if you are carrying, that means that teammates are like books in a backpack. Some books can be a lot heavier than others.
I mean you get games like this which suck and are unwinnable:
Your team:
You = Great player
Teammate #1 = Average
Teammate #2 = Average
Teammate #3 = Below Average
Teammate #4 = Potato
Their team:
Enemy #1 = Great player
Enemy #2 = Average
Enemy #3 = Average
Enemy #4 = Average
Enemy #5 = Below Average
Oh look, you lose because Potato doesn't listen to his team, gets caught out 50 minutes into the game. You take out a couple enemies and try to focus down their best player... while your below average teammate dies almost immediately in the team fight and your 2 average players aren't peeling for you because they are too worried about their own death... so you get killed before finishing their great player and then he mops the floor with your remaining team and they take nexus. "gg you belong in your current rank"
Uhhhh how about, no.