I don't understand this stupid approach to multiplayer games, can't you see that pinning premade teams against random players is making the game experience unfair?
Need an example? Team Tagada Nexus- Vs. Team Player 1 Player 2. Even if those random Player 1 and 2 have 2 k+ rating, who will win and why?
Playing in a premade team and playing with random players in a team demands a different approach and some differing skills.
Hence, it should be rated accordingly, separately: TEAM RATING and PERSONAL RATING.
And that leads to the notion that there should be no FULL SHARE, NO FULL SHARE lameness, but instead two different queues: 4v4 TEAM Queue, where premades fight over who is the better team, and 4v4 RANDOM TEAM Queue, where two teams of random players fight each other to show who of them are wielding that special situational awareness skill.
If you decide to allow premade teams playing against random player teams, in time it will transform TMM 4v4 into a race between snob premade teams who care nothing only about their personal (not team) rating. And imagine, you not having a team being constantly matched against such a teams. I doubt, getting beaten just because you got matched against a stacked team is fun.
But wait, what is a stacked team?
A proper stacked team is: big experience playing together, effective resource distribution, voice communication, lots of coordinated build orders for different maps incorporating all the team members.
So, who will win? That stacked team or that random team?
Another example (this one's real good): you guessed it! The Dual Gap (!) round between proper 6 player stacked team Vs. 6 random player team, who will win?
And then again, I though TMM 4v4 is being created to attract new players, I doubt playing against stacked teams from the start will bring much fun to the new player, it will, probably, do the opposite: drive them away to the "Noobs welcome (no gray)" lobbies, that should definitely make them continue playing FAF.
Now, what you want? Fair and fun experience for everyone or the chase for rating by some individuals at the expense of others fun, just because they think that more rating = better person. It is up to you .