I was going to upgrade to a ryzen 1800x, but after have no issues with any vr content (other than RF8) I decided to hold off.Ya, hopefully they can help. It could be an issue with your amd fx 9750 processor. Maybe it does not play as well as my i7 7700hq with rf8. In non-vr mode I get ~500fps on the 3d obstacle field. Much higher fps than you seem to get.
The last thing i am going to try is setting everything to the lowest possible setting just to see if i can get RF8 to get above 45fps.