One thing you can try, that should give you the same result as if you installed 1.0 + the VNAV patch. (I haven't tried it myself, since I have the stand alone VNAV patched with ver 1.0)

Uninstall 1.1.

Reinstall 1.0

Backup the .air files and aircraft.cfg files for each 777 model.

Reinstall 1.1

Restore 1.0 .air files and aircraft.cfg files.

This should give you the VNAV update without the flight model changes, that apparently is causing the rocking. (In theory)