This is not a minor patch. Here are the headline features:
Before installing, clone your device’s entire flash using an external programmer (e.g., DediProg SF600). If the T3L319 update full fails, you can restore the original image directly to the SPI flash chip. t3l319 update full
If you are still on v2.0 or v2.1, do not wait. The is the stability, security, and performance upgrade that the platform deserved. This is not a minor patch