Basically show the amount of each role your whole team has. Number color should always be equavalent to the Teammate/Squadmate colors you chose in the other option to avoid confusion. In this example case, 4/8 squadmates have the Assault class, while in total 14 out of 81 teammates have the Assault class. I am sure oki will find a way to make it look good.
This idea would increase the feeling of teamplay (especially on smaller battles like 16v16 or 32v32), while also giving insight on class balance and therefore the community would get a sense of current balance and can make more meaningful balance suggestions with data that is already available, but just harder to view right now.