So hear is my thought. You can take all the things you would want to watch a gauge for and then make it an alarm. For instance, I have alarms (not in a Miata) for RPM over 500 and oil pressure under 10 psi, RPM over 3,000 and oil pressure under 30 psi, etc. You can set as many as you want. So, then if the RPM to oil pressure correlation isn't correct, you get a light. No need to watch it while driving (you have better things to do!). If there is no light, you can still go to the data and review it. Plus, you then have a record of the temps and pressures for the season and life of the motor to see if the pressure is dropping as the engine ages.
You can also set yellow lights for warnings. Riding in the draft and coolant starts to get warm - yellow light and a message for what it means. Then you can work on cooling the motor and getting some air. Then their is a red light for too hot, you have to act now. Or maybe it's the last lap, you're in the lead, and it's now a trophy motor!
My general plan is to make well thought out alarms so that I can focus on driving and not trying to see what a gauge is doing. If it works for fighter pilots, F1, etc, it will work for me.