the images shown on the Review window always look desaturated (wash out) but if I make adjustments in SPP and make the image look good then the photo will become way over saturated and contrasty in the Photoshop. If I save the wash out look image as it is in SPP to Photoshop, the saturation and contrast usually look normal in Photoshop, so it is very hard for me to use all the SPP tools
What do have selected in SPP preferences under "Working Color Space for X3F files"?
Are you running a hardware calibrated system?
Do you have any proofing turning on is PS?
What "Color Space" and "Output File Type" are you assigning to your SPP exports? Sorry -- you answered this: 16-bit (therefore TIFF) ProPhoto.
Have you noted that you can open a "Full Res" image in the Reviewer. Click the button on the toolbar. This may give you a more true representation.
I have not seen -- in my two days w. SPP -- what you are seeing (either before or after today's upgrade).