No problems here. I typically get around 330Wh/mi in my P85/21", today with v7 I got 295Wh/mi over 39mi. Probably need to gather more data before jumping before jumping to conclusions. So many factors can affect range, from day to day and trip to trip.
Sudden shift to cooler nighttime/morning temps below 50 has a noticeable impact on range, as the battery needs to be warmed in the morning. I remember being surprised by this two years ago. Best way to address is to time your charging to wrap up just before you drive the car in the morning, so the battery warms up on shore power. I start my 80a HPWC at 5:45.