I understand your point. The Pearly, WLH, Slash, and 36th anniv aren't really PAF's. They're based on those but not really PAF's. I also believe that many PAF's didn't have alnico II but weaker alnico 5, as well as 3's and 4's. The 2 is fairly "modern" approach to get to a certain kind of tone and attack.
I don't play blues. At all. I play 80ies glamrock and heavy metal. But my attack is already quite 'bright', because of the picks I use and how i pick, so to me, a2's soften that high a bit and add a bit more fluidity in the leads so Alnico2 is not an issue for me. A5, degaussed preferably, is still my favorite but I think that wind, coil geometry, gauge, insulation, matters more.
The A5 is actually stronger than the A2. Only A3 is weaker than A2.
I also disagree with pearly and slash not being PAF. SD HBs have a solid PAF DNA. out of that list of pups I see one clear bad actor in every sense of authentic PAF.