Thanks for your feedback.
1. Indeed, you are right. The app is crashing after exitApp
function is called, even though adding a button that calls it is not a good practice. This seems to be a bug in Cordova and you can find numerous reports if you search for "cordova crash navigator.app.exitApp()"
2. We haven't noticed such a latency in the installing process, but we will continue observing it and take care to be as fast as possible.