I can update you on a few of these points:

For 2), there is no electric assist (as in no electrical motor). Any reference to electronics refers to the main-board in the handlebar that contains a bunch of sensors and things.

4) The lights are totally rechargable. There is a dynamo in the center of the front wheel hub that generates far more power than the system uses. Its expected that the dynamo will be sufficient as the sole power source. There is one high-capacity battery in the handlebar that powers all electronics.

6) At the moment the bike only notifies you if something moves into the blindspot, however it wouldn't be difficult to make it flash the rear lights at the same time to notify the driver.