Yes I agree with all of you. Zero started with the "Drift" which was tiny in the effort to reduce weight as everything possible to reduce energy consumption from the costly and bulky batteries was desired. Well from 2011 to 2013 each year there was rapid development. The battery energy density grew, and therefore it was less important to worry about ounces in the frame having an impact on range and so the frame also got stronger each year. The last major chassis change happened in 2013 and so quite a few years has passed and energy density has also continued to go up. So lets hope next frame is much larger and much stronger to adapt to many uses, and many riders.
I have a good friend in Santa Cruz who drives a Tesla and wants a Zero, but he is 6'8" and 300 pounds and doesn't fit. He always jokes and asks if Craig Vetter and I can put 2 Zero frames together or something for him so he and other tall or big guys can enjoy buying and riding a Zero too. Although having the frame lower in the back to allow a shorter seat that still has padding is important too. I'd like to see riders that are 4'10" to 5'5" be able to flat foot if needed.
All rider height issues could be solved with 3 different seating options with the main seat (like the one now) reaching the biggest area under the bell curve or 70% of motorcyclists, and the 15% of really tall and big riders, and the 15% of short riders could get a special seat to fit them better as long as the frame design had this in mind. Doesn't sound like much but it means Zero could sell potentially 30% more motorcycles just from this alone. Worth designing 3 seat options in my opinion. Even if it only ended up being 20% more riders, since Zero is selling more bikes each year, this becomes a bigger number and could be justified.
I hope if there is a redesign planned in the future that the chassis is built with touring potential in mind. If someone wants to have 40 kWh of battery on the bike, it should be able to handle it size and weight wise. Luggage weight potential in the back needs to go up. And having the frame go all the way to the back tire as one piece to save parts, save money, save assembly cost, and add strength. Right now the frame arches back from the center tube but stops 3 times shorter than it should. A solid aluminum cast piece is bolted in, and then an extender is bolted to that to have the license plate and reflector be at the back of the bike.
As time goes on it would seem making the bike cost less to produce would be a desirable goal, and reducing the number of parts that need to be ordered, stored, and then the time to assemble all of them could be cut from a design that had a strong frame that went all the way to the back of the back tire to begin with and could carry a passengers weight in batteries at the back if you wanted to.
Zero is just now 10 years old. Lets hope we can see something like this before the next 10 years is up.