Perhaps modifying the settings for the nose gear "contact point" might allow it to steer a bit better. I know it's stored in Community\captainsim-aircraft-m772\SimObjects\Airplanes\CS_B777-200ER_GE90B\flight_model.cfg, but I need to check and see how those settings differ, if at all, from the way it's done in FSX/P3D.

Overall, I don't find it too bad. Slowing down to say 10 knots, after reaching 20 knots, it turns pretty good for me. :-/