It would be great to have a button at IN-B to provide the function of IN-L-N. I first look up an item in IN-B to see if it is already in my system or if it is a new item.  If it is new, I find it very handy to copy the routing template along with the item in IN-L-N but then need to go back into IN-B to edit the item description (to include the customer part number).  
 
Steve