That's a lot of noise to filter through when the factor that matters for range is battery capacity, which is easily correlated with range: if you typically have a range of 70 miles under your driving conditions, when your battery is 15% degraded you will then have a range of ~59.5 miles. It's pretty simple.
By contrast, a range report: I drove 72 miles today using 182 Gid (%SOC is not meaningful because it varies as the battery degrades and older LEAFs don't report it anyway). A "100%" charge gives about 237 Gid on my car, last I checked, and turtle has been reported to be around 4-7 Gid. The elevation varied from 8100 feet to 5760 feet, the temperature range was 52ºF to 78ºF, perhaps a hundred watt•hours of AC use, more than half the trip was at 60 mph (actual), the rest at highly variable speeds including a half dozen stops. So, what is my range under those conditions? Perhaps ((237-7)/182) x 72 = 91 miles from full charge to turtle, except that if I had charged to "100%" I would have lost some miles due to the lack of regen descending my steep hill. And a few months from now the range for that same trip will have decreased drastically due to winter temperatures.
You might want to take a look at
Tony Williams' Range Chart, especially the footnotes, to get an idea what a gigantic variation in range there can be depending on speed, temperature, air density altitude, elevation gain/loss, wind, rain, snow, and the like. Never mind such big factors as driving style. The idea that my range, usually driving mountains between 8100 feet elevation and 5760 feet elevation, has any bearing on the range someone else might get at sea level, for example, is not credible. And
vice versa.
That's why we report the physical characteristics of the battery, such as Ahr, something that easily allows a look at how degraded the capacity of the battery is.
