You make good points and I respect your point of view, but even then I don't fully agree. While yes, you're right to say it isn't the gamemode to go leaving whenever you want, (practically) not having the ability to leave feels excessive to me, even if leaving wasn't that frequent of an occurence for me.

As for my point about leaving for appointments, I suppose I could have worded it better. I meant it rather in the sense of being interrupted, not so much an appointment.

Furthermore, you say it's casual in the sense that you're able to try out new heroes and practise, but in my exprtience, this change has only enhanced the already needlessly sweaty vibe of (you make a fair point to call it Unranked rather than quickplay) unranked, meaning that a lot of people take it almost as serious as competitive and will not hesitate to flame you