Own Nav?
In dense and complex airspace which tends to be heavily sectorised I question the wisdom of releasing an aircraft on to its own navigation when more likely than not the next controller will have to re-apply a heading. Of course I don't know the particular circumstances, but transferring an aircraft on a heading is quick, easy, and safe.......the next controller can make any "own-nav "decision looking at the bigger traffic picture. Just a personal thought! In order to help the pilot route to the desired location without delay and multiple button-pushing you could offer the magnetic track required and the distance to run as per MATS 1.