Sorry, but I in know way would I trade Goff for Lamar Jackson.
As I type this he just ran for a 37 yd run, but his passing is very limited. A lot of batted balls, throws sidearm at times because of his height. So you get sone exciting plays, but a good D will take that away and beat him in big games.
When he loses a step due to injuries/ age, he will be very limited.
I just don't see it lasting long.