I'd like the RGB LED to be a bit brighter and also to be a full colour addressable pixel LED (WS2811). Currently it's only 3-bit colour and takes up 3 GPIO.
Would be great to see some expansion modules with the same form factor as the M5StamPLC. I believe a 240V power supply is coming. It would be great to have some mains 210V/220V sensor inputs to handle higher voltage sensing.