4. No pics
5. 5'8" 165lbs. L4-L5 & L5-S1 herniated discs
6. Very firm. Inadequate lumbar support.
The 2008 MiniE and 2014 Tesla Model S (Version 1 Leather seats) both had similar issues. Very firm and uncomfortable. In the Bolt without an air pillow for support I am in terrible pain requiring naproxen (Aleve) on a regular basis. Ironically, the 2011 Nissan Leaf and 2016 Kia Soul EV+ have the most comfortable seats for me.
For those interested, this is the pillow I use and swear by for my herniated discs on poor seats like these:
https://www.amazon.com/Medic-Air-Back-C ... 012YI40HO/