Sounds about right for the battery, i'm similar. I just hit 36k on my '13 (i've had it a year, put 20k in that year on it). I really like the car, just wish the battery was in better shape or higher capacity.
I'm a 2013 (got it last year with 16k miles). Currently at 31k. I would say my battery has stayed the same but I have noticed it seems to fluctuate between 15-16kwh.
Excellent warning. I never go by the GOM when I'm going on the highway. I always look at battery percentage and kw/h used on the trip meter. It's a good day if I can get 60 miles out of mine on the highway going 55-65
Nice write up. I'm starting to see some '17 pre-owned show up. I have to tell you I've been seriously considering switching. I'm 8 months into my '13 and have put 10,000 amazing miles on the car however i'm at 26k with 15kWh available and it's starting to hurt.