It is feasable but as "not everyone has an Arduino" i can add that not everybody has the knowledge of soldering and pinout of led etc... Changing a led in a usb stick for me is very easy (just add a small transistor for switching higher current "if required"  and connect to it the brighter led with collector of the transistor getting the power from the 5+DC of the usb socket of the same USB plug just do a small bridge with a wire internally).... The problem would be solved and much easier if the initial place where the smd led is connected supports even a higher current. Inthat case you would directly solder the brighter led in lieu of the smd one...

Getting things into arduino would make it very interesting because you have thousands of conbinations (blink lights/leds/whatever, post a notification on a led matrix screen or tft screen, send via wifi or ethernet a notification to another device, etc...)