I dont think the offense is far away and I think they can win with Goff at the helm. They obviously need a WR or two but i think if that get that coupled with Decker shoring up the line(assuming he transitions well to RT and I think you can have a solid offense.
I dont think it would be some high octane big play type offense but the type that ground and pounds with the run game and use that to set up play action and open up the middle of the field.
The problem though is that the offense just doesnt have much margin for error cause the defense is atrocious. I think in and given game we may be lucky to force a punt or turnover 4 or 5 times at most so the offense either has to score TDs every chance they can or at worst have long drives that chew up a lot of clock.
And just for the record Im not married to Goff, if a guy comes along in the next couple drafts that looks like the real deal I wouldn't be opposed to drafting him, I just don't think we should be all in on QB just cause we feel we need to get one for the future and end up with a Blaine Gabbert, Josh Rosen or Daniel Jones.