caza, I agree with just about everything you said, but especially that it's time for a new model. I doubt Zero has engineering resources to modify all their offering at once, but in my mind, this would be a good time to drop a new model with the following traits:
1) A full-sized bike, as opposed to the smaller bikes Zero has been focusing on. The size itself isn't necessarily attractive to me, but see the next item.
2) A bigger battery, at least as an option. I think a larger frame could accommodate twice today's battery if done properly. Goodbye chatter about "range anxiety".
3) DC charging. I think it's safe to get onboard with CCS at this point. Or take up Tesla on their offer to share their supercharger technology. Better yet, both.
4) An aerodynamic full fairing package, at least as an option. Matching baggage would be nice, too.
To me, all this adds up to either a basic cruiser or maybe a bagger type of bike. Maybe the cruiser could be turned into a bagger with an optional aero package. I'd keep it clean and simple though, no hog wannabes, no gigantic interstate monsters.
Or maybe a nice-looking retro-styled bike, similar to the new bikes Norton and Triumph are bringing out. The industry seems to be offering more "standard" bikes than they did for years. Maybe something reminiscent of the old CB750 Four would interest people...but in general, something bigger, more comfortable, with better range, built for the open road.