https://www.dpreview.com/samples/1659227315/pentax-d-fa-85mm-f1-4-sample-gallery
Resolution wise, undoubtedly it is very good, near wide opened and from corner to corner for the whole image frame. Vignetting is also minimal at wide opened at F1.4.
But, it seems that the lens does lack some micro-contrast. The images in gallery do not look that three dimensional or "airy" after all. The colour rendition is also not that exceptional, IMHO. The old FA* or A* might look better in those two specific image quality aspects. My two cents, though. YMMV.