yhafting thanks for putting together such a comprehensive analysis of the CC and regen systems. Feedback from riders is always appreciated.
My 2c on regen... Changing how the bike behaves needs to be a conscious decision made by the rider. I agree it would be faster to be able to swap between regen modes with the flick of a switch. Yet the danger in accidently bumping a switch that changes your mode from high regen to regen off is just too great.
Experience with the bike will allow you to access the drive mode menu and adjust settings without taking your eyes off the road. Getting accustomed to the coast position of the throttle and how the variable regen works will go a long way towards setting and forgetting your regen mode. I normally drive in the high position, sometimes when driving in the city I'll switch it to medium. Medium is also useful when riding tight twisty back roads with imperfect road conditions, keeps any accidental throttle movements from upsetting the bike too much.
As for the function of the CC - pretty much everyone agrees that the CC button is too far away to comfortable enable while maintaining constant throttle position. My hack for this is to engage cc using my left hand, not ideal but it allows you to maintain your speed. Other members have swapped the set and cc buttons on the control, and rewired the circuit to use an additional button on the left side.
Quick engagement of the cc function is again something if done inadvertently could be dangerous, by accidently bumping a button it would cause you to accelerate quickly without throttle input. I see the other side of this coin and totally understand how cc would be easier to use if the function of the buttons changed. Being able to select between 2 different function modes (current and what you suggested) of the regen system in the bike's preferences menu might be an way to satisfy everyone?