Thank you for the overview.
Here for completeness is an explanation of the performance parameters:
FPS:
The actual framerate. Maximum 60 fps (Under Oculus maximum 75 fps).
This value is in most cases the minimum of FPSR and PPSR.
FPSR:
The framerate that is possible with your GPU (not the CPU).
A value of e.g. 121 mean you are well above the 60 fps, so your graphics card is not the bottleneck.
This value is only well-behaved if V-Sync is disabled in display settings, because otherwise the sync lowers this value.
PPSR:
The framerate that is possible with your CPU.
A value of e.g. 80 mean you are well above the 60 fps, so your CPU is not the bottleneck.
CPU somewhat of a simplification of this value. The memory and bus speed also has impact on this value.
On an Intel i7 2600 CPU 3.40 GHz this value should be well above 60 fps in 99% of the time.
If your PPSR is lower that 60, than e.g. having less cloths on the girls (or less girls) can help.
But best is to run XSP on a faster system.
SPSR:
Not relevant for performance.
It is the performance of the thread synchronization and is well above 60.
CPS:
An runtime estimate of your processor cps.
(So if this value is lower than what is said on the CPU box you have been cheated

)
Mode:
The graphics mode. There can be a large performance difference between OpenGl and DirectX.
So if your FPSR is the bottleneck, try another render mode to see if that helps.