The recent press conference dismissed the idea that any waypoints other than the scheduled flight were entered.
There is no evidence of any other waypoints being entered prior to the cutoff of the transponder and ACARS.
The last ACARS transmission reported the standard flight plan, Kuala Lumpur to Beijing.
If any waypoints were entered after that, there is no way to know short of finding the plane.
The flight was at least 12 minutes into the new westerly course change before putting out their "good night" message at 0119 and at 0121 the transponder, etc were turned off (per FOX).