We played this event last night and I was very disappointed. The GM is one that I have known for 20 years and trust - 5-stars, knows his stuff.
We spent a not-insignificant amount of play time discussing how and/or why the author attempted to specifically hamper certain types of PCs or those who employ certain tactics. In my opinion when players spend time talking about this sort of thing in lieu of play it is a bad sign. "Suspension of disbelief" is shattered when their game doesn't make sense.
There were 6 separate occasions where we stopped game play to discuss how certain things could even be possible within the game rules and in some circumstances we ended up with "the scenario says so." If that happens during an event it is poor or lazy writing. We even wondered if the author must play with 1-2 specific PCs he intended to thwart with this event.
Paizo has dozens of rules supplements available and because of power creep/arms race mentality, we are left with fabrication of rules for the purpose of "challenging the players?"
Our table was comprised of experienced players and thus had little problem completing the scenario in the allotted time, even including the rules discussions but I can see newer players being turned off by this event. The feeling I was left with was the author trying to show us how clever he is in working around the rules. Instead of that, I would have appreciated some more story development, much of which has been mentioned in previous review.
If scenarios like this one are to become more prevalent in PFS play because of a vocal minority of optimization specialists in the player base, PFS is going to lose a number of casual players who would rather things make sense.