RE: Does CG affect an aircrtaft's pitch at slow speed?
To address the "pitch at slow speed" question specifically............
Basically the AOA of the wing is resolved by the speed of the airplane and the airfoil's ability to generate lift. The airfoil winds up at whatever angle of attack needed to fly at whatever speed the pilot causes. That AOA is slightly modified by the drag of the airplane at that speed, so if the airplane is cleaner (no flaps etc) there will be less drag and more speed capability and possibly less lift needed.
So where would the CG come into play in this mess? A CG can artificially load an airplane. If it's too far forward, it creates extra load that the horizontal tail has to "carry" over and beyond the pitch stability function of that tail. So the tail has to create downforce to balance the downforce being created by the too-far-forward CG. And the wing has to carry all that extra load. It has to create more lift and the only way it can do that is with more AOA. And AOA is pitch.
And when a CG is located farther aft, it creates artificial load too. Good thing is that as a CG goes aft it catches the attention of even the least experienced pilot. So most are not apt to have the CGs back there.
So yes, the CG can affect the pitch you see at low speed. But will you see it? Or more correctly, will any of us be able to tell the difference in pitch from one landing to another? Probably not.