Suggestions:
Many OEM Zero Motorcycle accessories have now better options from 3rd party USA manufacturers. This is a good thing I think and should be encouraged as @BrianTRice says.
1. Chapman Mfg makes a mini ratcheting tool
I've reviewed previously. It includes most but not all bits useful for working on Zero Motorcycles vehicles. If a fastener up to 200lb-in torque specification doesn't have a Chapman Mfg bit available then it doesn't belong on a bike, or alternatively you should get right on that and tell Chapman Mfg to make those bits!
2. Official technical guidelines for 3rd-party charging equipment manufacturers (namely Diginow and their Supercharger V2). Doing all of the certification to get the ChargeTank compliant with a worldwide market is fine, but why not off-load this huge time-and-resource sink in the future to someone else? Publish the guidelines for a 3rd party to make charge equipment that is complaint and so Zero Motorcycles can focus on the good stuff like a battery and firmware that can safely charge at 1C rate and greater.
3. Happy Trails makes a SU-series side rack for Zero Motorcycles bikes that is better built and less expensive than the OEM rack, plus it is made in USA. I guess you have to offer that OEM one to make bikes that are police fleet ready but... all it takes is lending a bike to some manufacturers and we riders get better options. The Zero OEM top rack is useful for a small to medium top case but not very sturdy to do things like carry a mountain bicycle on the back.
4. Keyless ignition kit. Possibly this is for future models. Security focused so you can access the bike with a key or even powered on but it won't go anywhere until authorized. Might not actually have to develop this module just publish the specification.
5. Reverse "gear" or even just a mode where you can keep the bike powered on but the controller is not energizing the motor; that small difference between the bike being off and the bike being on but kill switch engaged is enough to give a difficult time backing up with leg power over curbs and drainage ditches or back up the hill.
6. Easy options for crash protection; more 3rd party options for brake levers, slider spools, crash bars, hand guards
7. Service Manuals? What about for out-of-warranty bikes at the least, can start with that.
Kudos on re-routing the (turn-signal obscuring) brake lines for 2017+ bikes. Can we get advise how to correctly fix this for 2016 bikes?