As I already said, easiest fix would be to drop out Viera graphical update and retain the original look for this one race.
In current game version, this race looks great compared to all older races, all faces looks perfect in my opinion and everyone I know is satisfied with how the Viera looks. They have this specific charm which is lost in DT benchmark tool.
Is there someone who thought Viera needed any graphical "uplift"? Whose great idea it was?
On the other hand, kudos to all that beautiful enviroments and water, game finally advancing into 21 century ... within engine limitations of course

Also some older races benefited from this rework. Hyurs, Lalas, miqotes looks great in the new graphics.
Of course, these was also affected with minor changes on face, mainly the lips.
But I guess lips will be fixed until release, it looks like a common bug across all races.
This Viera fiacso however - I can imagine many Viera mains will not be excited for DT, including me

I dont think this will be fixed until DT release in 2 months, so best solution would be to
exclude Vieras as a most negatively affected race from this update, or at least postpone it until devs squash all the bugs.