Try getting some Ginger supplements. I take them daily and can play on this game for hrs with no nausea. Must be them helping as i am an occasional player when it comes to VR. By that i mean i can play it a lot then just not bother for weeks on end and i do not get nausea when i return to it.
Only been playing this a few days now. Not really been affected by motion sickness but i eat ginger and take supplements every day so that may be why. We need more people playing it on MP. I am in UK Europe and have only found 1 other player so far to dog fight with.