I'm open to change to make the game better. I truly am. But not this one. It's going to get stupid. A cynical foul to stop a potential break and goal is a yellow and always has been. That they get to come back on after 10 minutes is not that much of a punishment as you know what the other team is doing whilst a man is in the sin bin. Time wasting to see it through. Even if the clock is "stopped" virtually, it never really is. There is always that time pressure when it gets way past the added minutes thing and the refs cave and blow earlier than it should have been.
I don't see what benefit it brings. If they can't control their mouths and reactions and make cynical fouls, then they deserve yellows. It adds complexity to an already working system.
If anything there have been calls for an "Orange" card, which is between yellow and red, for those fouls that are really nasty challenges but not quite reds. Perhaps if you got one, it could be like a yellow plus sin bin of ten minutes. Or maybe just that if you make one more foul at all, you're off.