So you want Riot to penalize players for not being able to afford highly-expensive powerful internet services?
I understand that losing a game to an afk'er can be (and, for the most part, is) pretty rough to recover from, but punishing people for not being particularly wealthy is not going to fix anything.
I do believe that the non-afk players should be able to get some type of compensation, if they lose since they were at a clear disadvantage. And, if they do somehow win, they (in my opinon) should get more of a reward for "winning with a crutch". That /remake system will do us all a big favor of allowing us to exit games "freely" if a player is afk before the game even starts, but for those games where people leave in the middle, I don't know what would be a feasible solution for that, as you can't truly punish a player for something that is completely out of their control.