If you have to do a big turn (say 60 degrees) to follow a route, it smooths out the turn instead of tossing you out of your seat when you hit the route waypoint at speed. 5 degree per second setting; it would take at least 12 seconds to do the turn. Rate of turn is also an output so that AIS can broadcast it, etc...
For wandering, the software update would be easy, but also check the basics like the linkage to the rudder feedback is not sloppy, the rudder isn't loose and it's shaft is moving around where it shouldn't, After the basics are set and dockside is done again, then the last step would be to move to sat compass for heading.