I have read many articles that said Daniels had problems reading his calls on the DL when playing center.  Which was the main reason for him moving.  Not a whole lot saying he could not physically play the position.  Playing center would also allow him to have help from either guard and vice versos would allow hime to help from either side.  But maybe I'm wrong.  My question is why does the center have to make the calls.  Why can't one of the guards do that like WH playing left guard with Daniels playing center.   it can't be just seeing the alignment of the defense.  Any of the guards or center would see that clearly.  What am I missing

Noise has a lot to do with it.  The center is closest to the QB making it easier for the QB to hear and transfer.