I'll chime in on this for the benefit of the latest thread posters thinking seriously about it, or who've just bought it. I was also on the playtest, with a review submitted earlier in the thread.
I'm coming from the perspective of a 4.0 who gravitates towards spec'd up player/pleener frames. IMHO, other than the 2023 Dunlop FX 500 and Head Auxetic Extreme MP, the PA23 is just about the most inviting, universally playable 100" tweener on the market right now. I still have it in the closet, rotating in/out of the bag, and if I were to commit to it, I'm sure it would lead me to lower-energy-expenditure tennis with equal or better results (eventually, anyways). As it stands, I have to spec up my Prestige MP-L to ~340g, ~8-9pts HL and go north of 335 swing weight just to produce the weight of shot that I can get with the PA23 at ~325-330g, 32+cm and 327sw. It's just an entire level of conserved energy lower than most any player stick.
For the time being, I, like
@Chairman3 and some others from the PA23 playtest, have moved back towards more conventional player/pleener sticks, which tend to be a bit better for net/touch play, flatter-hitting and/or the OHBH, all of which I have as part of my game, but if I were to go back into tweener land, the PA23 would absolutely jump back on the radar. The level of counterpunching stability, power and ease-of-input-energy that is affords the operator just cannot be ignored, and if you sense you'd be ripe for any/all of that, then it absolutely warrants a look.
A note on strings -- the more swipe you hit with, the thinner the gauge and lower the tension you can get away with on the PA23, but even with the more dense pattern versus the '16 and '19, it's still a bit of a string eater, so I say it still tends to be best with mid-upper 1.20's poly and 1.30-ish and thicker synthetics, all on the gummier/more-muted side for some additional shock absorption and comfort. For my flatter game, T1 Black Knight 1.28 in the low 50's has been by far the best, to tame the string bed (as I pancake the ball more so than most), but I realize we're all different in that regard, so what works best for me certainly won't work best for others.
Hope that helps!