There are probably enough gadgeteer modules to start grouping them logically e.g. right now the 2 ethernet modules are on not near one another.
I’d would suggest catagories such as…
Power - Sp, DP, Battery
Sensors - Button, Joystick, Gas, PIR,etc.
Power Control - relays, motor control
Network, Ethernet, Wifi,
Display - LEDs, char display, Daiseylink matrix, oled, 7"
Extenders, maxo, extender, USB, SD card.
Specialty - Pulse metre, CNC,