What if team builder used the mastery system for matchmaking?

What if team builder used your team builder MMR combined with your mastery points on that specific champion for matchmaking, instead of using your team builder MMR and an adjustment for a champion you haven't played in team builder yet?

Sometimes people play a champion a lot, but not in team builder. This way you could get your MMR adjusted to be higher or lower based on your total experience instead of based on not already having used them in team builder yet.