Perform a final hardware design review before PCB routing.

Review the complete grill controller design and identify any potential improvements, omissions, reliability concerns, serviceability concerns, or manufacturability concerns.

System includes:

* ESP32 DevKit V1
* 12V LiFePO4 battery
* Fuse protection
* LM2596 buck converter
* Five MAX31855 thermocouple interfaces
* Five thermocouple connectors
* IRLZ44N blower fan driver
* 12V blower fan
* STS3215 smart servo interface
* Battery voltage monitor
* Test points

Review specifically for:

Power

* Reverse polarity protection
* Fuse sizing
* Grounding
* Decoupling
* Noise

Thermocouples

* Noise susceptibility
* Connector placement
* Ground loop concerns
* Trace routing recommendations

Fan Driver

* MOSFET suitability
* Thermal considerations
* Flyback protection

Servo

* STS3215 interface robustness
* Power integrity

PCB

* Trace width recommendations
* Connector spacing
* Mounting hole recommendations
* Serviceability

Future Expansion

* WiFi antenna clearance
* Additional sensors
* Additional servos
* LCD/OLED display support

Provide a prioritized list:
Critical
Recommended
Optional

Do not modify the design automatically.
Only review and provide recommendations.