i do have, and prefer, texture maps without painted brows.  and in about half my pics, i go by hand through my "v3" folder in my textures folder and grab one of the several transmaps in there and apply the transmaps to the brows and change the color of the brows.  i generally choose hair color last, and choose textures based on the skin tone i want.  also, i find some darker textures use a more brownish/hue shifted looking eyebrow instead of a nice clear black and use the transmap to enhance that. 

basically, this is making a rare practice more difficult and unpromoted.