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I'm thinking that it very possible that Jack Rickard did not change his driving style when changing the ways that regen was set up; and when you do not take advantage of coasting (or if the cars he drove do not coast very well?), then that would not improve things.
With a lot of regen, then you have to use a lot of accelerator, and since regen is less than 100% efficient, you are bound to use more. Coasting is always better, since you can use less throttle and if you underestimate, just add a little more throttle. It is too easy to overestimate, especially if the regen is on the throttle and set too strong, so you over accelerate and then over brake, then you can easily waste energy.
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