Competitive matchmaking

Hello, Blizzard! You’ve introduced 2-2-2 role queue, but as I realized, you hadn’t change matchmaking. And now we have a situation, when, for example, diamond healer and his DPS buddy from low gold enter plat game. This buddy took DPS slot and do nothing - team lost the match.
At this moment the situation when one team has Avg tanks SR 2500, DPS SR -2000 and healers SR - 3000 and other team all slots has about 2500 SR is possible. And it’s unfair.
Can you improve your matchmaking mechanics, so it take in account not average SR of a team, but average SR of each slots. For example, just add the rule to matchmaking, which finds a teams with close average SR for each slot.