To reduce interior temps without using electricity it would be interesting to have a solar roof with a small air space under the cells that could allow air flow to keep things cool.
I like my Chevy Bolt but the one complaint I have is the lack of comfort in the seats. The ride is typical Chevy firm but I can live with that. It's the seats that keep it from being a much better car. They are okay for short in town rides but after an hour or so you really start to notice. If I'm going to take longer trips of several hundred miles I would really appreciate some comfortable seats and a good sound system.