It's hard enough to understand your own 500 page playbook, let alone recognize other team's 500 page playbooks based on a few things, like safety and mlb alignment and such. It doesn't help that Reid runs a very traditional WCO without quick reads by receivers (though his usage of the RBs on receiving patterns kind of fills that void). Elite QBs are genius, nothing short of.
It's not that he doesn't recognize, that's kind of a stretch. But he's average at it. He's kind of like a rookie or a 2nd or 3rd year doing it. That's why the side blitz gets to him often.
One guy, to illustrate, that isn't great at blitz pickup, but is nonetheless a great QB, is Ben Roethlisberger. Again, he makes up for it with his strenght.
It's about what you compensate with. Rodgers has some problems with slants and short passes. Brees is too short, so he sometimes don't see defenders in front of him, Manning is afraid of the hit and is a statue, Brady doesn't have a big arm to make throws on the run and is a statue...
Every QB in this league and in the past had flaws. It's what you bring to the table, not what you lack. Vick has something in him noone has and I don't think noone will. To play him effectively, you must crap all cover 2 man away from your playbook, you must keep a rover all times... Teams do figure out a way to play him, but to do so it requires a very specific type of defense. And every QB in this league has a blueprint ot win against. Yes, even Payton Manning and Tom Brady. But, with them, it also requires a very specific type of defense.
And those defenses can be countered by some things, a great running game being the most common case.
Football is a chess match. There's a response and a counter response to everything, and who utilizes the pieces better wins. Wow I really sound like a know-it-all *******.