Now that we all know what I am talking about. I want to say first that this IS a welcome change. I am grateful that you are willing to give groups a little bit of leeway on what they run. This is a good thing that can only improve matchmaking.
However, I resent that you have demonstrated that you have zero clue what Flex actually means. This is not a flex system. This is a fill system. If you gave people the freedom to swap roles mid match then this would qualify. However, This is choosing your role(s) before the game and getting assigned one.
Pretty much just like solo queue.
Please consider allowing groups to at the very least do the following:
Allow players to choose their role AFTER they join a match.
Allow players to elect to swap roles mid match.
Edit: Clarification. The ability to swap would be under the same restrictions as what you can queue as per the ptr notes.
Assuming we are talking about non comp, I just dont think they want ppl to swap roles mid game, and I guess only letting groups do that could give them an advantage. Allowing people in comp to do it just wouldnt make sense with how the separate role mmr works. Unless the ppl wanting to swap are like within 25sr of each other on the roles they picked vs want to swap to.
We are in fact talking about comp and quickplay both.
I see no problem in giving advantages to people who desire to organize. Advantage should be given to those who are willing to put the effort in.
As for SR restrictions on swapping., Typically people are within 500 SR in each of their roles and seeing as all involved would agree on a team to do so I see no problems here.
Fairness should be about equal opportunity. Not circumstance.
500 Sr can be a very big difference. And people would totally abuse it. Most people play in ranks where you can be 1000 sr away and que with others. We could have people who are diamond on the roles they want to play, but low gold on others. And que into a low gold game, and swap to roles they are diamond on. Which completely defeats the purpose of role based mmr.
In some ranks its 1000 apart. Say im 1500 on tank, and 2500 on dps. My friend is 1500 on dps and 2500 on tank. I que as tank, he ques as dps. We get into a 1500 game. Then we swap roles and are now 2 2500 players in a 1500 game. That is different from what people can do right now.
Then how close do you want the sr to be to let ppl swap? The games are made where both teams mmr is very close. Allowing ppl to swap is going to change the teams mmr.