I wrote it in another thread
I copy here.
FYI I am in Europe
"Let's just accept the fact that matchmaking is not affected by OVR.
Is there anyone who can confirm otherwise?
I got played 4 games yesterday. All of them with my signature team
One of them was with Silver bench and starters like Howards/Ben Simmons/Jahil Okafor and his best player was Klay.
One of them had similar rated team as mine.
Last two were full of diamonds. One of them had Ruby White chocolate as PG with Marion/Grandmama and Ben Wallace
and the other starters Ruby Kobe as PG, Ruby Eddie Jones,LBJ, Diamond Bosh and Diamond Wallace, and on bench Diamond Parker/Ruby Walker and Rodman etc.
If there is any overall matcmaking (which I don't believe) I just cant see it.
The only matchmaking I see is Difficulty seeds. For example I am on Diamond league and I face opponents from Ruby League and up"