Yup - in passive mode, I also 'need' a passive tone control - to tame the harsh high-end from roundwound strings, especially for certain styles. I also have the SD single-coil pickups in my M5V.
And in active mode, the passive tone control offers a different sound and approach to tone shaping than cutting the active treble control does.
So that mod gave me a lot of options - and made the electronics about as flexible as they can be - so yes, I'm happy and satisfied with the results for my tonal goals.