Since you asked, I never supported selecting Goff to begin with. Fix what? They got beat (outplayed & out coached) by a better opponent and Goff's inability to scramble or extend plays were simply exposed once again as being his primary weakness. He's a pocket passer with very limited mobility except straight ahead. At times, he stares down receivers, holds the ball too long and appears to lack much pocket presence. Yeah I know some say it's just that he keeps his eyes down field....uh huh, well I call that a lack of pocket awareness. The primary reason, IMO why he's been as successful as he has been (has) more to to with McVay's play calling (tonight being an obvious exception) and that "O" line (when it's on and giving him gobs of time).
But when things aren't going well or are sped up like tonight for example, I just don't believe Goff can effectively carry the team. He's neither elite or crappy, he's a tweener and that's where he's essentially been since his arrival. Stats don't always tell the entire story between the white lines and so far Goff is a prime example. Give almost any accurate passer the time (protection) and he'll pad his stats, but put them under duress and stress and their weakness's soon come to the fore.
Replace Goff? LOL, they've already had two shots at a franchise QB, Bradford and Goff. Bradford was damaged goods to begin with and unproven beyond his sophomore year....nothing like picking a player #1 that hadn't played for the previous year or this one that did nothing in college but make a second or third rate bowl game in his final season. And his claim to fame......improving his team from total crap to mediocre.