The problem I see with side to side rotation is that if the insides of your tires are worn, they will still be on the insides. To change wear from inside to outside, the tires need dismounted and remounted with care to keep the orientation the same.
But, this depends on if the tires have inside/outside or directional bias. I don't believe the Enasaves do, but I have yet to rotate the tires on either i-MiEV. Of course, I haven't gotten more than 15,000 miles out of a set yet.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013
"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015
2017 Bolt EV LT in Orange with QC - 7/31/2017
Driving electric since 2-21-2013.