Here's the most recent response from "Tesla Support" regarding my 2014 S85 30+ mile range loss, extended supercharge times, and increased phantom loss as a result of their "firmware" update:
Thank You for contacting Tesla!
We are very sorry to hear that you are experiencing issues with your Tesla's battery system.
We are seeing some issues where batteries are being underestimated by our range calculation system. This does not affect the energy retention capabilities of your HV Battery but, only the displayed range. We have found that in cases where the battery is consistently charged to a lower state of charge, between 60-80% capacities, estimation becomes less accurate and tends to underestimate the true capacity of the battery. The result is an incorrect reduction in the displayed range estimate. This does not affect the true range of the vehicle, as the end-of-drive conditions are based on real-time battery measurements of reducing battery power, rather than software estimates. In any case, we recognize the inconvenience and negative user experience associated with this incorrect and reduced range estimate, and we are developing more accurate estimation algorithms which will be pushed as over-the-air updates.
You can also perform a battery discharge to a low level of 20% - 25% followed by a full charge to 100%. This method may be able to correct your Tesla's range estimation algorithm and you will be able to see a more accurate range estimate on your display.
Lastly, if you are continuing to experience issues with your battery range, please schedule a service center appointment and our service team will be able to inspect and test your Tesla's high voltage battery system. You can schedule a service appointment directly from your Tesla mobile app or you can find the contact information for all of our service centers at the following page: Find Us | Tesla
Please let us know if you have any further questions or concerns and thank you for your support to accelerate the world’s transition to sustainable energy.
Best regards,
S. P. | Tesla Support
While in previous responses Tesla Support had acknowledged that "a small percentage" of Tesla owners experienced a loss of range and they were working on a fix, now they are stating that battery range is being "underestimated by their range calculation system". What a crock! Telling me that it "only affects the displayed range" is ludicrous. The fact that I now have to charge to visit family members when I didn't before, take twice as long at a supercharger, have had my S85 turned into an S60 overnight, with the only software updates received being frivolous arcade games is a clear indication that Tesla has lost touch with priorities and customers. The question lingering is . . . how many customers does Tesla have to lose before they address this issue? I'm saddling in with the class action suit.