If you win when autofilled you should get more MMR

Notice that I didn't say you should get more IP or LP. What you should really get if you win when you're autofilled is more MMR because it shows you can still win in a off role. Yeah some of the time you might get carried but if you can consistently win when autofilled its a sign that you're a more well rounded person than others at your rank, hence why you should get more MMR. I think a similar argument can be made that you shouldn't lose as much MMR with an autofill loss but I we should focus more on a reward for winning rather than a mitigation for losing.