you can already clear one EQ band at the time (in fact, this seems to be the only option to clear an EQ, you can’t clear the full EQ in one swoop?), so why not add the option to enable/disable one EQ band at a time?
could be as simple as press and hold on the EQ band to turn it on/off
It’s a neat suggestion for how to achieve it (by holding), but it would be useful to know more about the use case for needing to switch bands on and off rather than resetting them.
Regarding clearing all EQ settings, this is done by holding the ‘Reset’ key and pressing the EQ ‘In’ key.