Read moreThis is a really interesting solution, and I love that you came to this conclusion/idea!
So actuallyyyyyyyyyy we are already doing this! Our MMR system is split between your "Encounter" MMR and your "Win/Loss" MMR. Then, depending on your rank, we combine a % of each one to make your individual MMR! Then your MMR is used to determine your RR gains/losses.
Encounter MMR is essentially performance based MMR. It looks at every duel and how you had an impact on that duel/round. Did you use an ability to help take a site, get the bomb down, help a friend win a duel etc. Encounter MMR rates you directly to your opponents in every single interaction you have in the game.
In lower ranks encounter is weighted extremely heavily, and if you are a smurf the system is pretty good at detecting this(we've seen accounts get detected and moved in less then 5-10 games). Some people may remember TenZ getting into Radiant MMR in 16 games. As you get higher in ranks win/loss MMR...
!pin