I've ski'd them at both -1cm and -2cm (the team line) and have never experienced too much tip dive unless it was in like 20 inches of pow. haha. Not going to hate on your skiing without seeing it but maybe there's something in your technique?
I don't think going -3cm instead of the team line will do too much except possibly harbor some performance while skiing switch. I love the way the ski'd switch at both mounting positions I've tried.