I honestly think that this team rank is the biggest, the most retarded and unfair mechanic relic introduced in coh2. Because its being abused like there is no tommorow. And with the amount of pre-made teams existing, because you can count pretty much every single pre-made ever created as a separate player, its slow in ranking up.
Yeah, that feature probably needed a bit longer in the oven before it was actually implemented into the game. Part of the issue is that the relatively small playerbase makes trying to create a balanced match a little hard, especially when you're doing premade team-games, which divides the functional number of players into a quarter of the actual total searching.