Ponderthought: I might reverse the effects of Bulging and Segmented eyes, but I am really not sure.

Also, unless it already exists, you might want one for Scent.

Despite the lack of a bonus to Spot, I think that Sensitive tongue makes the other blind-sight granting feat basically pointless... maybe make the first one grant scaling dark-vision instead, and the tongue a flat 5 foot blindsight?
That sounds right actually. ill switch them.

Theres already a Scent feat, I suppose it could easily be considered a a Mutation feat.

Also, what other blind sight feat? I only count one, unless ive finally gone completely senile.