Not sure whether this is in your plans for the future, but can you do something or put a penalty in place for those who quit a M+ group. This is getting beyond a joke and not only wastes people time, but also ruins the persons key.
I know there are issues with M+ and this is a big one. If people received some sort of penalty then maybe they will think twice.
That’s one thing, but when will they solve the meta problem?
Why can’t the vast majority of specializations get into the key?
Why is Aug Evoker in the meta for the 4th season in a row?
If you can’t eliminate the meta, at least introduce some fair rotation.
There are specializations in the game that have NEVER been in the meta.
The only viable solution to this problem is to add a loss of rating if you leave the group. But it will require a bit more setup than what is in place in Pvp otherwise it will just create more problems than solving any.
Exactly -where- is it stated that you are obligated to stay in a group you join?
Exactly -where- should the line be drawn?
There is a thousand reasons why someone would leave a key - If you and three others feel the need for revenge, should that be enough?
People will stop playing this game as a whole, that will be the consequence. That is not in the interest of you or anyone who invests significant amounts of time to this game.