The reason you should get rid of the surrender at 15.
Because there will always be that one guy who says no. The fact that one person will ruin it for the other 4 is just ridiculous. We all have a passion for this game and find it generally enjoyable, but we all suffer from the toxicity of the community. And because the community is toxic, there will always be that one guy to say no. hell there's always one guy out of 4 that will say shit like "report" or "?" or "GG EZ". I don't really recall having a game that the surrender went through.