There are those makers who grind in the bevels after heat treating to reduce warping. At any rate, you don't want to bring the bevels down to a sharp edge so you will have to finish the grinding after heat treating. As far as more holes go, fine, if you want reduce weight or make the knife less handle heavy. However, more holes equals less surface area and less surface area means less adhesion. Of course, using some sort of bolt or rivet will increase mechanical attachment.
Doug