This is more curiosity than a feature request, but is there some reason for the specific MKL04 pins being used? It almost seems like the order is capriciously chosen to make it annoying to route cleanly and there are a bunch of unused pins. Would it be possible in the future for a few of the signals to be duplicated on multiple pins? Since this chip is only used on DIY custom boards it seems like it should be as user friendly as possible.