Please do not add a feature to chop up 1 or 2 photos to make a 'photo mosaic' from because...

Doing so would make your company look ignorant and not well accepted with the more sophisticated, serious, or knowledgeable photo community that is aware of the fact that true photo mosaics are created from complete pictures, not pieces of pictures, and would be inartistic and ignorant to do so. If a user wants to create a mosaic from sliced or cropped photos they slice and crop them ahead of time themselves so their mosaic isn't made up of butchered people or subject pieces or of accidental images zeroing in on inappropriate body parts etc...