I have some ideeas:

Homepage must be more useful, put a decent speedometer, maybe car like analog type ? 

Weather status, app shortcut, playing song info, maybe if possible small map screen that drives with you. 

And when my car starts it cuts power for a while, and i set it turn off when power if off. Can you set delay for it

For example if power backs on Xxx second dont apply power off inputs, maybe ?

Thanks