1. The only reason to run the gas engine under 25 miles an hour should be for recharging and generating, period. EV mode only at low speed.
And Toyota may have started out planning on along those lines, but may have gotten focus group research that indicated people preferred a little more acceleration.
2. An expert mode should be available wherein "creep ahead at stop" is disabled
Having switched to owning only manual transmission cars, I only miss that on a metered freeway onramp, that's uphill. I imagine it's added behavior when in electric-only mode, to simulate a slush box, so not sure how it could be universally defeatable. There's no "neutral" on those smug little cars?
3. Cruise control should also be able to be set by a numeric keypad, and should be able to handle values lower than 23.
That's an awesome idea, rather than having to bring the car up to the desired speed manually. But I wouldn't be surprised if it's the government disallowing the latter.
4. Sport mode should be available that disengages the traction control and enables all three motors for acceleration (you can get the second half of this in a gen2 by angrily stomping on the accelerator, it takes a second to engage, but you suddenly go from 34 HP to 174 HP as the second electric and the gas motor kick in).
Why would a Prius owner want this?
5. Finer resolution than 5 minutes on the average MPG consumption graph.
6. Ability to download trip data onto an SD card.
Likely never, directly. Companies want your personal info to go to "the cloud" first, so that they can mine it and monetize you further.