Sorry; I downloaded your pictures, looked at them, couldn't see any problem. Looked at my own shots with the P4P North West Escondido | Barking Deer℠ Photography
Looked okay, and a print I made of that image at 13"x18" looks great. Your pictures in the snow BTW are awesome.
Then we have different eyes. Did sent the files to the supplier who replied me within a few hours that i had a faulty lens. The replacement P4P produced vastly better files. I am a very experienced photographer but rather critical about quality of lenses.