Propain is currently offering the large TQ battery (580Wh) with a discount. Maybe a hint that there will be an new (larger) battery for new motor.
Only speculation, but could be.
It is the combination of the gorgeous natural feeling with the low noise level. And for technical steep climbs a slightly higher support/push would be perfect.
And with 70/80 Nm there should be no negative effect to lose the natural feeling.