Drafting a QB isn't about the first year. Nor even the second year. It's about the next decade to decade and a half, particularly when it's a pocket QB.
Some big names from the best QB ever lists and then Goff, with breakout year being the first year they got over 90 QBR:
Tom Brady
Physique: good height, skinny build, solid arm
Type QB: Pocket
1st season: limited snaps, 1 of 3 for 6 yards, 42.4 QBR
2nd season: 2,843 yards, 18 TDs, 12 INTs, 86.5 QBR
3rd & 4th season: 85.7 & 85.9 QBR
BREAKOUT YEAR: 4
Joe Montana
Physique: short, skinny build, weak arm
Type QB: Pocket
1st season: limited snaps, 13 of 23 for 96 yards, 81.1 QBR
2nd season: 1,795 yards, 15 TDs, 9 INTs, 87.8 QBR
3rd & 4th season: 88.4 & 88.0 QBR
BREAKOUT YEAR: 5
Payton Manning
Physique: good height, skinny build, solid arm
Type QB: Pocket
1st season: 3,739 yards, 26 TDs, 28 INTs, 71.2 QBR
2nd season: 4,135 yards, 26 TDs, 16 INTs, 90.7 QBR
BREAKOUT YEAR: 2
Dan Marino
Physique: good height, average build, strong arm
Type QB: Pocket
1st season: 2,210 yards, 20 TDs, 6 INTs, 96.0 QBR
2nd season: 5,084 yards, 48 TDs, 17 INTs, 108.9 QBR
BREAKOUT YEAR: 1 (freak of MFing nature)
Roger Staubach
Physique: good height, average build, strong arm
Type QB: Pocket
1st season: limited snaps, 1 TD, 2 INTs, 69.5 QBR
2nd season: limited snaps, 2 TDs, 8 INTs, 42.9 QBR
BREAKOUT YEAR: 3
John Elway
Physique: good height, athletic/physical build, freak arm
Type QB: Pocket (with plus scrambling ability)
1st season: 1,663 yards, 7 TDs, 14 INTs, 54.9 QBR
2nd season: 2,598 yards, 18 TDs, 15 INTs, 76.8 QBR
3rd and 4th season: 70.2 & 79.0 QBR
Brett Farve
Physique: good height, athletic/physical build, strong arm
Type QB: Pocket (with plus scrambling ability)
1st season: limited snaps, 0 TDs, 2 INTs, 0.0 QBR
2nd season: 3,227 yards, 18 TDs, 13 INTs, 85.3 QBR
3rd season: 72.5 QBR
BREAKOUT SEASON: 4
Aaron Rodgers
Physique: good height, athletic/physical build, strong arm
Type QB: Pocket (with plus scrambling ability)
1st season: limited snaps, 0 TDs, 1 INTs, 39.8 QBR
2nd season: limited snaps, 0 TDs, 0 INTs, 48.2 QBR
3rd season: limited snaps, 1 TD, 0 INTs, 106 QBR
BREAKOUT SEASON: 4
Drew Brees
Physique: short, average build, solid arm
Type QB: Pocket
1st season: limited snaps, 1 TD, 0 INTs, 94.8 QBR
2nd season: 3,284 yards, 17 TDs, 16 INTs. 76.9 QBR
3rd season: 67.5 QBR
BREAKOUT SEASON: 4
Jared Goff
Physique: good height, skinny build, strong arm
Type QB: Pocket
1st season: 63.6 QBR
2nd season: 2385 yards, 16 TDs, 4 INT, 101.5 QBR
BREAKOUT SEASON: 2?
Looking at the above, that being the best QBs in the modern era in sustained top performance over many years and subsequent Hall of Fame type careers, only Dan Marino "lived up to" what the media demands from young QBs. So once again and for the millionth time, for any media type who wants to slam on a young QB they should really do their MFing homework and understand the historical data surrounding the position.
Jared Goff not only compares just fine with what he's done this season, but given the youth of the team around him, coaching, etc he is likely to exceed many of the Hall of Fame QBs on the list above. And before someone starts trying to divert the conversation to Super Bowl wins, for any of us who has watched this game longer than most Seahawks fans we know that is also about the team not just the QB.