Just like this post so there is a chance we get this into the game.
I think it is really important for LFG to be able to unenforce the roles mid game because sometimes people forget the same settings with qp and you end up playing comp with enforced roles. So this can be really frustrating to deal with and although you can definitely win with enforced roles, it puts you on a great disadvantage.
I don’t really see any drawback about it. It shouldn’t be abused, the leader should be the one deciding whether he will put it on or off and just in case people might thing that it can be abused by the leader they can just completely not add it on quick play.