I do not like the idea of reverse being accomplished by simply pushing the throttle forward while stopped.
Imagine if you come up to a stop light and get stuck for a while so you sit back a bit and crack your fingers then when it finally goes green you quickly reach forward, twist it the wrong way and crash into the car behind you. It should definitely be at least a 2 step process...maybe even more 1) Full stop, 2) Hold reversing button for 2 seconds, 3) Twist throttle. Having a lengthy process like that makes it difficult to activate it accidentally and how often do you need to go into reverse immediately?
Zero should definitely reintroduce DCQC, Tesla SC, ChaDeMo, CCS, it doesn't matter, but it needs to be available. Maybe even offer the adapters as a loan, like You're charged the full price for a new one from your dealer, and can walk out with it, then when you return it you get all but $20 back unless you buy one and you get a brand new one...basically meaning a free rental if you buy afterwards. That way people can know which chargers they can use and which they can't.
Larger battery would be nice, but I wouldn't expect much improvement, if any.
I think the biggest thing is price. You can get a used Leaf for less than a used Zero S with the large battery, that's a tough sell particularly given the limited usability of a motorcycle versus a car.
Aerodynamics are fairly cheap all things considered, but Zero is probably avoiding them just for the cost savings, however it should certainly be available.
Lighting changes are minor so if people voice their desire for it, LED could come around for next year.
Charging updates would be great, but as it stands they expect the average person to use the bike for daily commuting rather than long distance so a larger battery is more important to them than faster charging (easier round trip for long distancds and always charged overnight).