I have 3 tables, 2 with the router centered and one as far back as I could put it, more or less centered on the length. If you clamp your fence on and need to work from different angles or sides then centered is good. Otherwise you are wasting tabletop. Unless you are making grooves you will only move the fence back as far as the center of the bit or to the pilot bearing. By putting the one table with insert as far back as I could put it I have more support surface for my work.
Just another opinion.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.