I don't care for the divorce for two reasons - one , it came out nowhere with no buildup. Two, I dislike it because if you look at silver age comics, Jean is a rarity - the one who wasn't trying to get a wedding ring and cared about establishing her career before marriage. And she's the one that ends up a cheating divorcee. Terrible messaging. Made worse by the ghastliness of IC. At least if it had been a mutual parting of the ways... instead she was the villain of the piece.
Of course, I also don't like Sword of the Atom, and have a general preference that Ray not be "so committed to the Atom" - I mean, yes, he cares about being a superhero, as all do. But I like him very focused on his civilian career as well (he and Jean being similar in that regard early was appealing). And yes, very focused on his romance, too. As you say divorced heroes are a rarity, I'll chime in that Ray was a rarity in the silver age, too, in that it was the hero, not the love interest, that was more in pursuit of the wedding ring. I'd say it was a bit overboard for humor, but frankly it was incredibly low-key in comparison to Lois or Lana or Steve.
Character assassination on par with Heroes in Crisis, IMO. Just a less cared about character that it was inflicted on.It's hard for me to imagine Jean Loring as anything but Ray's crazy ex-wife, but I'm admittedly coming at it from a more modern perspective on the character.