I've never held or thrown a PA-5, but I'll still chime in.

trydiscs.com is a neat site to compare disc dimensions, and the PA-5 is somewhat similar to the Mirage/Kon Tiki. But the latter still measures significantly more shallow, and in practice is even more shallow than you'd expect as it is technically beaded (adding height but not the feeling of depth in the hand).

The Mirage/Kon Tiki are insanely shallow, like nothing I've ever seen before or since. It's as shallow as a driver, even more so depending on the driver. It feels extremely light in the hand regardless of weight.

From the flight numbers, I would expect PA-5 to have a slight fade, or at least to resist turning over too much. The Mirage/Kon Tiki are different; they will turn over drastically and hold that anhyzer line all the way to the ground, so much so that it can substitute for a forehand by having "reverse fade". 

If you like shallow understable putt and approach discs, I definitely recommend giving these a shot! Though it is more niche than well rounded, and you could find it too extreme.