I'm thinking this is more and more the case. Why not run more 2-TE sets? Why not implement just a little more quick passing like the patriots? He's boy genius why cant we be just a little more versatile?
It's not just the long developing routes, but they are play action passes. So Goff is under center and has to turn his back to the defense, or at least take his eyes away momentarily. Whatever he see's pre-snap he completely loses for a second or two, while he's selling the run fake. Then as he turns out of the fake, he has to read the defense within a split second and make an accurate throw. Sometimes the WRs aren't out of their breaks and he's holding the ball. This might be why Goff misses some reads, because out of play-action he's literally whipping around trying to dodge the rush in his face and decipher coverage at the same time.