Use F11 and everything is perfect up to 12mm shift. With the P40+ you can shift more but corner sharpness
gets worse, but normally I don't need corner sharpness in skys and ceilings and floors..........
With the P25+ you will be happy.
There are some very good V lenses as the 40 CFE IF, the 100, the 120 and I love also the 80 CFE and the 150 CFI.
My Rodeys/Schneiders have larger image circles but in the center (+ - 5mm shift) they are not visibly sharper.
But this should be discussed by pixel peepers, I only have to earn money with these lenses.....