Throttle control may be more effective if we can see how much power we taking from battery, I not understand Honda, they include power meter on insight, clarity, new CR-V e:HEV, HR-V e:HEV, but Jazz e:HEV not, there plenty space on screen, they can put it as simple linear meter above real time ICE consumption or replace it with power meter, this can help to get better mileage.
Of course I can use OBD tool with car scanner to add this function but not everyone can do that and this is not good, as this requires to have another smartphone or tablet and need to be mounted on dashboard.
When I used this app with elm327 adapter I have set on screen power meter and I clearly see how much energy used, and also simple to found accelerator pedal position when I want to glide after I get to speed I wanted, need to play with accelerator pedal to get power consumption close to 0 (possible to do that also without car scanner but much difficult)
In this case when consumption at 0 on meter car gradually loses speed if we on level road like with manual transmission in neutral , or accelerate when we on slope but this more efficient then accelerating and then braking by using electric braking as we loses some energy.