There's no oil, what are you going to measure? Currently, I get speed, energy consumption in Whr/km, a choice of instantaneous or average projected range over 10, 25 or 50km, power output in kW. I also get state of charge of the battery, either in 'typical range km' or %. The Autopilot shows me the surrounding vehicles and the road markings that it uses to determine the position of the car on the road as well as blind spot detection and proximity sensors when driving or parking. If I want to, I can turn on the rear camera view whilst I'm driving. There's no reason to see motor rpm with a flat torque curve. I have tyre pressures if I want them, not much more to measure really. The mapping shows me all nearby chargers and even how many bays are available at the Supercharger I'm driving to.
The phone app lets me set internal temperature, turn the HVAC on or off remotely and monitors the state of charge when the car is charging. Is there anything important that I'm missing?