Pjam, it sounds like your car
is displaying the regen circle and telling you that you recaptured some percentage at a stop, right? But people think maybe you aren't actually getting any regen?
I can think of two other ways to get an idea of whether it's actually regenerating.
One, as you are coasting to slow down without pressure on brake pedal, shift from D to L. Or coast in N, then shift to D. Do you feel the car's deceleration increase? You have to be at less than 100% SOC of course but it sounds like you're never at 100% so that's easy.
Two, queue up the enhanced trip display on your dash and get to the top of your hill. If that long downhill is pretty long, the displayed kWh will eventually go down by 0.1 kWh or more as you coast down the hill, if it is truly regenerating. It won't show a negative number so make sure not to reset it at the top of the hill.
Anyway, if it isn't a lack of regen, there's still got to be something wrong with the car for your numbers to be so bad. I only get that efficiency when I'm driving with heat on, outside temps in the 20s-30s. I've tried driving it aggressively (hard accel, hard stops, city roads) in nice weather to see how bad the efficiency would be, and got like 325. We don't have hills, but San Diego's not
that hilly.
I hear you on the skepticism of your local dealer. Those of us who experienced the stop safely now bug saw how clueless the dealer's service can be, even though they are supposed to have EV-knowledgeable techs to be EV-certified. But they knew what they didn't know, and correctly sought guidance from Detroit, so I would assume yours would too. Plus CA has sold the majority of the ~2000 FFEs in service, so there might be a dealer fairly close who's worked on one or two, or at least on an Energi.