You have also not posted any proof on any of your claims either, you do not have internal data, only speculation. Developer comments have said the response to Role-Queue have been positive.
^ Balanced team compositions have been a positive response from players.
^ Dev comments how matches IMMEDIATELY felt fairer and more winnable.
I’m against Priority Pass it doesn’t solve much. Blizzard needs to make Tanking feel better. I’m experiencing nearly the same queue times as before.
A player dropping to Plat/Diamond when dropping from GM can still appear in GM games. I have experienced this. A player peaking in Diamond on the Tank role I have never found in high GM games.
If what you say is happening then the matchmaking is to blame.
I’m not gatekeeping anyone, it’s from my experience. You are welcomed to add yours but GM players will most likely not take it with a grain of salt since you have not experienced high level play. You can think what you want i’m not stopping you what you believe is “facts”. I’m just telling you from a GM perspective what happened, these are discussion and feedback forums. You don’t have to believe me. 
https://www.businesspowertools.com/opinion-vs-experience-a-big-difference/
I can get an idea of rank from Overbuff as linked in previous comments. You can see mine as well from Overbuff.
Again we can agree to disagree on this.
As stated before low rank players and high rank player experience the game differently. What you have responded to me is a relativist fallacy to my overall experience playing in GM.
As posted here by a dev he explains reasons for longer queues and what Role-Queue should bring to the table. Role-Queue has definitely improved my experience in GM.