I once had a blind Nicheling protect my gathering group from a Bearyena. She was awesome.
I agree that something needs to be done about Blind Nichelings not being able to move. Blind People need to move slower so that they do not run into stuff. Maybe there could be a speed penality on blind nichelings? Or give that "Call to atrract wild animals" a new purpose: When a Blind Nicheling is to far away from the tribe maybe it could follow up after hearing the "Call", because now it knows in which direction it needs to go.