Round Table Follow-up Question For Rank Meanings and Matchmaking at 9:35 and 11:10

In the video having a fair 50 50 match is stated as most important, however a flaw in ranks could hamper the systems ability to do this. I'll give an example to show what I mean. A match with a pre-made consisting of players who all achieved there ranks by playing primarily solo against a team of solo players who achieved there ranks playing primarily pre-made would not be matched at a 50 50 win chance. This being because being pre-made essentially amplifies individuals skills by combo'ing them with others, so players who used this frequently throw off the system when they don't pre-made and those who don't frequently used it throw off the system when they do. Is this a concern?