I'm sorry, I'm pretty ignorant, in what ways will I be limited if the serial port is disabled? As far as modding goes, I'm not interested in modding it any further. I just assumed since .367 is the latest update that it would improve speed/quality of life.70.00.100 already has AA (non AIO version) built into it. Once it senses the GENUINE Mazda USB/SD Card Hub, AA should be enabled.
See also: https://cdn.shopify.com/s/files/1/2367/6353/files/CPAA_INSTALL_INSTRUCTIONS_AND_LINKS.pdf
I would recommend NOT installing .367 since it disables the serial port and prevents further modding.