Personally I think the comm aspect is not that important (unless a team is super competetive). Imho the best teams don't need an overload of comm. I would argue that a good team could perform equally well if they were not allowed to use comm at all ... Meaning that they would work together fluidly.
You can get away without using comm if you act as a full team member. What you can do is follow 1 other team member ... and by this, that team member knows you are his backup ... and by this the team aspect grows without using a single word:)
Here I revive a downed team mate ... he is pleased ... all COMMLESS
That said, minimal comm is adviced, esp helping out with the video feeds after you are downed!
TLDR; imho good teams only need very minimal comm (but maximal intelligence;)