Now Krita would be able to load Grayscale PSD as well
Hiya Planet!
After long time i am back again for commits 
So yesterday i pushed some code to open Grayscale PSD in Krita.
Please send me the PSD that dont open. I will try to make them work. A lot of work has to be done yet actually its never ending because of so many features
You may find some test images in the gimp bugzilla:
https://bugzilla.gnome.org/buglist.cgi?quicksearch=product%3A%22GIMP%22+PSD
thank you for your work on PSD support !