I have the opposite issue - the leds that flash to show which note was pressed are too dim and too close to the default colour. I would definitely prefer if I could make them flash brighter.
Maybe your device is faulty, to me the note leds are as bright as all the other leds.
I can imagine that you find the blue led hard to see on the (always on) green drum leds.
Though that could be an other request to have the green drum leds switched off or dimmed!
So I don’t believe you would object to have an option to check that the leds are still 100%, while others can adjust it somewhere between 10% and 100%.