The nausea effect is broken due to the new camera system. 

Expected Results:
The image just gets distorted.

Observed Results:

1. Your head will move without your input;
2. Everything looks vertically stretched in certain points of view.

When facing north/south:

1. The screen rotates just slightly.

When facing east/west:

1. Everything rotates in a weird way, with your POV often going higher than it should;
2. Your crosshair is no longer an accurate indicator of what you're looking at.

When facing straight up/down

1. You'll keep switching directions;
2. You'll no longer be facing straight up/down when switching to Third Person View and back to First Person.