What.
The.
Actual.
Flippin Tree.
You get MORE MASTERY POINTS FOR WINNING WITH AN S THAN IF YOU LOSS WITH AN S.
I' m not refusing it, I admit it. I said it twice, Jeez, READ THE POSTS.
IF YOU WIN IT GIVES YOU MORE MASTERY THAN IF YOU LOSE.
But the score and individual performance should be PRIORITIZED over it, as it fits RIOT'S INTENT FOR CHAMPION MASTERY.
This is not just a personal thing, but also Riot's.
Your score is determined a lot by how you contribute to your team, not just KDA; Objective kills, overall damage, healing, damage tanked, warding; Riot has taken measures to make sure it's not just solely based on KDA. So it does take objectives and teamwork into account. But the key thing is how well you do as that champ. Warding and taking objectives and winning can be done with every champ. Your performance as a single champ needs to have a lot of outstanding things to achieve champion mastery, and the player should be rewarded for doing so.
IP and XP are based on teamwork. Champion mastery on individual performance on a champion. IP is based on game length (it increase linearly). You do get slightly more IP for winning, but not as much as the game length Ip awarded. First win of the day is... self-explanatory.
What, you want them to add "First loss of the day"?
Mastery experience IS champion mastery which IS the performance, which gives you the rewards or whatnot. It gives you things as a prize for doing good with the champ, not for working as a team(Mostly individual; They support teamwork too).