The actual parts that Zero use such as the Size 6 Sevcon controller and 75-7R motor are used at their max power already i think. the Sevcon are rated up to 116V and 660A and they are used at those settings already.
So therre is no real locked mode in the Zero because the controller push max power already. you wold need to replace the actual controlelr for a Size 8 to get more current to the motor and improove acceleration.
Have you ever checked Zero app for mobile phone? If you try, you ll never tell such stupid things anymore.
Bike pushes power step by step - more speed - more power, it does not give all what he has from beginning. It is very safe, but I want more and I m sad of it ((((