Hmm, let's see if this disappears down the pan by October like so many new initiatives.
Personally I'm fine with putting pressure on the goalie, part of the game, but if a challenge is applied that restricts him from jumping off the ground or pushes him after he has jumped (which is potentially dangerous play) that's a foul. The United one was borderline, but as Joe Hart said there is some need there from the defending team to help protect the goalie, get a body in between him and the Arsenal player. Not going to see a ref blow so quickly for a foul on your own player, so may was well use him as a springboard.
I'd like to see it more applied to the grappling in the box when one player decides he wants to swap shirts mid game, or the arms come out to restrict movement. No reason for arms to be up until your jump, unless you're signalling for the ball to you and that's straight up, not out like a crab.
As for Haaland, he could be cello taped to the goal post by the opposition and the ref would just see it as leveling the playing field. This ignoring of fouls on him at corners because he's got a reputation as strong is not the correct application of the rules.