WRT Melon's posts, this would only change things for users who Melon blocked, not users who blocked Melon. And I guess Melon would be able to see the posts of those who blocked him (and he and others like him could sic their followers on vulnerable users without using an alt).

You already still see his posts in the feed if you block him. And he still can't reply to you after the change if you have him blocked.

I'm still against the change, mind you, because blocking somebody should block them from seeing what you post in case of a stalker/harasser that isn't dedicated enough to make an alt account, which is most of them.