1. Precision voltage reference - no matter what the input, there will be a reliable reference
2. Change of current measurement IC - now it can measure from -0.1V to 30V.
3. Addition of Hall Effect sensor

The Hall effect sensor is meant as a tool to wake the device - since it is so small now, it can easily be used as a monitoring device for another circuit in a semi-permanent or permanent installation. With the Hall sensor, it can be used to wake the device remotely for measurements on a as-needed basis. Since the addition of the High Voltage Element, I've not found a reason to use it, so I might remove it for something else.

Do you have any ideas about what other features that might be interesting to add? Let me know!