Good overview.
The AWD will never be as economical as the RWD, even if driven purely as RWD due to the extra weight.
A quick note on charging, would be to ditch the Bluelink app and use the Ohme app for charging purposes. You will find by setting charged by x time on the Ohme app and letting the likes of OVO and Octopus do the rest, will yield better reults. OVO also suggest you do it this way 🙂