NFL will look at the fumble-out-of-end-zone rule

Worst rule in all of sports

At worst, it should be other teams ball at the 1 yard line.

Appropriate for the infraction should be loss of down and a 15 yard penalty.

Maybe make it different if the defense managed to touch the ball before it goes out but stop rewarding them for nothing
Yep, if it's not recovered by the defense it should go back to the offense at the spot of the fumble imo.