1- You should look at previous posts regarding the number of CVs, there are plenty, more or less saying the same, no need for another one.
2- There is no lack of communication, at all. Wargaming reacted already several times (check Sub_octavian posts) about that matter and informed the players about the MM status with CVs, why there is sometimes several CVs per team, and more importantly, why it will not change in the future. What is the point for them to repeat themselves? Should they every week or month react to the topics raised here which are always the same?
So, the frustrated customers know (if they look for the information more than 5 seconds).
EDIT: for you to know that they have been working on it anyway: