This sounds a lot like what Boost on a shimano motor does if set to max assist.Why would they made up something like that?
A completely new feature is the Shuttle Mode which can be enabled through the Mission Control App. Enable it and rather than the usual torque based assistance, the motor provides power based on your cadence. That will be especially useful for less fit riders because the full power of the motor is delivered with a lower pedalling input. Simply put: at higher cadences (from around 60 rpm) the full power of the motor is used without having to pedal at 200 W.
Why do you even need Shuttle mode?
If you can't pedal 150w-200W on a climb, than you will get little less boost, no big deal.
I have always had boost on mine set to max.
at my local DH venue I can soft pedal (barely trying at well less thsn 200w) at a fairly high cadence all the way up the fire road climbs staying at just below the 15mph assist cut off.
Why WOULDN'T you want this?