Nice looking bike. I recall Pittsburgh as a city of big hills, We stayed downtown one July 4, maybe 1998, and walked to the river to watch the fireworks.
Other than a mirror, there's nothing more I would add to your Roadster, When you start electrifying regular bikes, one of the bigger things becomes battery placement, after you decide if you want mid motor or a hubmotor.
For stealhier looks, choices include smaller battery on bag on a rear rack, small battery pretending to be a water bottle on frame. Sometimes a battery on the frame can look sleeker than a big fat aluminum ebike frame.