This pretty much sums up my dismay. Tesla migrated away from an understandable common sense method of communicating their product's power levels and to some BS method that speaks only to the motor(s) itself/themselves.
I've tried to imagine the conference room discussion(s) that led to this. Here's the play I'm seeing in my brain (you are each entitled to your own theatre, of course):
The D started to come together, and Tesla management was blown away by the launch acceleration. They probably weren't sure what they could achieve until they got to practical testing and tuned the D software. They got excited! As introduction approached, they sat down to write the web-page specs. They got stuck on HP. 463 (not really different from the P85 and not much more than the 85D) just did not represent the launch performance of the PD in insane mode. They talked this over, discussed various approaches to presenting HP, and decided that showing combined motor HP was the best way to draw attention to the launch performance difference. It is possible that they rationalized this was OK due to the EU reg. Rather than using one spec approach for the D and another for the RWD cars, they decided to move all of the S lineup to this new approach.
Now, they've added back the *original HP metric. I'm sure that they are having quite different conference room discussions on this topic. I'm sad that this has turned into such a disappointment for some number of PD buyers, and such a distraction for Tesla. I keep trying to remember (and I hope you all will too) that they are a very young company, growing in leaps and bounds, bringing to market at scale something that no other car company has succeeded with - on many fronts. There have been amazingly few mis-steps. I see nothing else to indicate that they are unethical, so I don't believe they were in this case. I hope it can be resolved so that everybody is accepting the resolution, if not happy.
I'd be very curious to know: has the proportion of people ordering the PD vs. the D changed since they posted the *HP metric?