...
- Find Lower Resistance Fuse (Voltage Drops in Power Path Selection)
Ideally with a smaller package size as well (the fuse could be old therefore having higher resistance?) - Use only 2 parallel FETs for the power selection inputs (Power Path FETs Power Dissipation and Temp Rise)
- Find connector to replace screw terminal for easier assembly (not high priority)
- Add current sense to power supply input (instead of 0 ohm resistor)
Unless there was a good reason it was not there to start - Aux Switch Implementation (to completely turn off the car)
...