It would be welcomed to see the current battery pack cell temperature and its history. Current temperatures are low and I'm active on a forum. Lots of questions on people asking why their car is charging so slow. Most of the time its because their cell temperature is too low.
It would be nice if the current temperature of the pack is always visible on Model S/X as is possible with performance models that have Ludicrous+ enabled. This way it is very easy to spot that it is due to the low temperature.
This is similar to the radiator water and oil temperature as with ICE cars. Knowing the pack temperature is an essential variable in knowing the health and state of the car while driving.
Potentially it can be visualized too in the energy graph to show the history of the metric. Currently, it only shows energy used/gained but maybe an additional variable called cell temperature would help.
As the purple temperature visualization is already present in the software it is only a matter of just always enabling the visualization. It would be a very convenient feature!