Under EU law (and presumably some related US/UK/rest of the world laws) that any product that can trigger epileptic fits has a legal obligation to warn users of this risk
I suspect (but do not know) that the same thing would apply to nausea and/or motion sickness
I am thus fairly certain that CG will be left with several legal alternatives:
Remove the motion
Remove the game mode
Add an ability to turn off the motion
Add some warnings at login about the potential issue
Stop providing the game in various parts of the world
Of these - there are some that are clearly more financially astute than others - shall we say