I have finally managed to update coh2chart.com Now, it supports arranged teams and you are able to filter statistics by ranking. The data is also downloaded directly from Relic's server. (Yes, Relic gave the permission to do that ) So now, the charts are really precise!
I have been working on this project for a quite long time. I will try to update this site more often, so feel free to give suggestions. And also please feel free to donate, I would really appreciate it
Here is a picture of a random 2v2 500+ chart: