We need a "Routing Location" column in the serial routing slip template, so that we can show the different locations each serial needs to be routed to in each routing slip. I guess the column need to link to the "Address" item under "Alternate address", in the Patrons data input page (in our case). We don't need the "Due Date" column. Also, it will be terrific to have a module for us to edit the routing slip template, so that we can make changing in it.
There is a bug report for making the routing slip customizable in the notices tool. As there is currently no way to achieve what you want to do and libraries might disagree about how the slip should look like, this seems the best way to go. *** This bug has been marked as a duplicate of bug 9750 ***