I'm sure that if you "slam on the brakes" (per GP), your car will take region to the max and the apply the real friction brakes, causing lots of kinetic energy to be converted to heat and "wasting" energy...
(Also, Tesla cars do have blended braking between region & friction...)
That is an accurate meter, it is not a Tesla problem. My PHEV works the same way, but that fact isn’t really relevant.
The meter is presenting you the regeneration “rate” but what you’re thinking of is the regen rate integrated over time, I.e the amount of charge recovered during the process of stopping, which the meter is not showing you.
Maybe, I don't really care about regenerative rate, I just notice my meter going to max when braking hard. I only use the battery for city driving and hard acceleration on the motorway anyway. It's great for merging onto the Spanish motorways.
