Does the “M. N.” stand for “Middle Name?”

PF2E has a lot of crunch, so combat slows down dramatically as character level increases.

Paizo uses words very specifically, much like lawyers. Note that in your highlighted text they use the word “abilities.” A critical hit is not an ability, it is a game mechanic. It also isn’t modifying the weapon’s inherent damage dice, just the dice rolled for one attack.

IMO, sneak attack damage should and does apply, even on a crit with this weapon.

“Now into downward-facing dog….err… cat.”

Don’t forget the Ray’s Dead spell