I expect that front tire wear will be much faster than rear tire wear and the frequent rotation just allows you to share the wear between front and rear tires. I think that since a significant portion of the braking force is on the front tires (regenerative braking is only on the front tires) and all of the "driving" force is applied to the road with the front tires, this "double duty" for the front tires plus the steering forces applied by the front tires, it should be no surprise that they wear significantly faster.
This in no way explains any of the reports of uneven wear. I would be curious to hear any explanations for the uneven wear.
Thanks in advance,
Pat 
This in no way explains any of the reports of uneven wear. I would be curious to hear any explanations for the uneven wear.
Thanks in advance,