To address the issue with the dishes not cleaning as well as before, I checked the obvious first; such as the strainers for debris preventing adequate water flow to the pressure pump etc.
The water fill height was proper, but there was still a hidden problem that I had to narrow down.
On the Bosch particular model, The upper spray arm and connector was not properly sealing the discharge water from the pressure pump; and in removing the drawer, and looking at the plate where the water flow is coupled to the manifold, I noticed the internal plate gasket distorted and oval like; and that was limiting the flow of water through the arm because of leakage, and bypassing the spray arm assembly.
A quick snap off after applying a little liquid soap on the clip to ease romoveal and replacement, and All Fixed.....
The Rinse door pryed off easily, and again added soap on the hinge pins to make it easy.
DONE!.... Works Great!