Re: Arena Penalty
Arena currently is a casual mode. Although I see your side of the argument, it is nevertheless susceptible to hackers and sweaty high level players that would be pointless to put up a fight with. These are valid reasons that I would count a reason to leave a match, it's simply a waste of your time. Abandon penalties are meant to be implemented in ranked, and ranked arena if you did not know is arriving very soon, you can even see it in your season info.