I’ll take Brees assessment of Goff, which he believes in Goff.
Goff is resilient and will be a top QB in the NFL for a long time.

Quote from espn article Jan 19.
As for Goff, specifically, Brees said: "Oh man, he's tremendous."

"There's not many guys that are just better pure passers/throwers," Brees said. "You watch what they do with their offense, there's a lot of moving parts, and I think he handles it very, very well. He creates great timing and rhythm in the passing game. And obviously he had a phenomenal season last year, but he's had an even better one this year. The future is really bright for him."

[www.espn.com]

For cap reasons only Rams should wait until next year to give Goff a big extension.
Gurley, Foles, Austin and Bradford were extended too soon.