At first I was like, "Wow.. this is actually a really good idea!"
Then I realised it would end in a 40 way tie for 1st place.
Go back to the old BC system. My god it annoys me to see people at 2400 with a negative W/L ratio without bugging their MMR.
If you had a negative W/L in BC you'd be sub 1500. BRING IT BACK BLIZZARD.
Just because you have the same MMR doesn't necessarily mean you'll have the same TR. If your MMR is capped at 3k as a team and you have a winning streak of games against other 3k MMR teams, your TR will be higher than theirs.