I don't know Rip. May be a weak upper shock mount pushing into the batteries? Too much anti-squat built-in with the downward angle of the swing arm?
The bike has chronic "jacking" or antisquat under acceleration but not because of the suspension geometry.
Its because the motor is mounted to the swingarm.
The torque reaction in the hub motor axle feeds into the swingarm and effectively turns it so the suspension extends almost to top of stroke.
If the motor turns forwards the axle and swingarm turn backwards.
You also see the forks jacking but that is due to weight shift.
When the throttle is chopped the whole bike squats back down, front and rear.
I recently made a rear end for a trike with a Kelly motor mounted to the swingarm and it did the same thing.
Watch the KL9 in this video at 32s for an example of torque reaction.