Some ideas from my side, focused on the SS9+. Most topics apply on all models.
1. Throttle
I love to set regen to max in the city and only ride with the twist of my hand. The last few degrees of the throttle travel controls the level of regen applied. For my taste it provides insufficient controllability because it kicks in only in the last few degrees of rotation.
I'd love if Mrs Energica would improve this
- keep the forward rotation (top of grip rolls towards the rider) for acceleration with spring-loaded return. If fully closed, the Energica would coast without any regen.
Add back backward rotation to apply regen braking. Again, this negative travel should be spring loaded (tbd higher force) and circa 1/3 of the forward travel. Side effect: In parking mode, it can be used as reverse, so no need to push the button to toggle fwd/reverse. And probably there is no longer the need for a SW setting of the max regen level.
I have experienced this on a Vectrix scooter. At first unexpected, but even after a few kilometers, it feels very natural.
In case this is too much effort: Increase the angle that is used to apply the regen. Probably to be done only by a SW parameter change (if so then add this parameter to the settings menu).
2. Craftsmanship of top cover plastic part.
For a >>20k bike, the squeaking part does not match the overall perfect build quality. I guess the root cause is the Energica Heartbeat LED section in the top cover. Same plastic type mounted together create squeak - every automotive designer knows that, why not Energica? An unintended gentle push will already make it squeak - sounds like coming from the cheapest Chinese scooter, not at all worthy of an Energica. Choosing different plastics would solve this without extra cost (but due to different shrink rates probably require new tooling).
3. Primary gear - straight toothed
Either drive chain sprocket directly, or as mentioned above, use belt drive right away... It is not that I couldn‘t stand the sound (it’s Even kinda cool). But imho electric riding goes along with silence. Would pay 500EUR/USD/GBP extra if I would have the silent option.
4. 3G/LTE connection to check charge status
Already mentioned, I‘d second that.
5. AC Charger with min 6kW, ideally 11kW (most Type2 charging stations in Europe have 11 or 22kW - they are growing like wheed even in unexpected places). Already mentioned. I would accept additional 5kgs plus extra cost.
6. Find some storage space for documents - lockable & rain proof (underneath the seat?!)
7. Better harmonized suspension. Without spending >2k on Ohlins, the rear suspension‘s damping does not match the front fork. A problem easily solvable for Energica.
8. Button layout for cruise control - already discussed...