On #3, all pass plays have multiple options. The play call is NEVER "just throw it to this receiver no matter how good the coverage is". That's just a bone headed play by a QB that knows better.

On #1, that pass is just completely inexcuseable. And PS Jamaal doesn't miss the block - it's a play action pass so Jamaal has to fake taking the handoff before picking up the blitzer. The blitzer didn't buy the play action fake so by the time Jamaal carried out the fake he couldn't get to the blitzer.