All players who do not manage to connect, leave or otherwise aren’t present somehow to a PVP match gets a penalty of 200 rating and a no-show debuff that increases each time you fail to be there.
Your actual MMR is unaffected as of now.
This penalty was introduced after significant feedback to do something about leavers in matches. I was already afraid and expressed my concerns that it will also hit the occassional/accidential leavers but it was not introduced with any leeway.
No.