Doesn't that concern you at all? I mean, the marriage itself wasn't done with that kind of purpose in mind. Not really. It was a gimmick, all of those involved admitted that. But somehow its a gimmick that turned out had legs and suddenly TPTB were petrified at what they had done. And for some reason they panicked and we got ... the 1990s. All that Clone Saga stuff didn't have to happen, you know.
OMD, as you say, was totally different. There was no intended fun in the storytelling, no motivation to tell us a good story or have it be reversible like all comic stories are supposed to be. It was just a ham-handed editorial fiat.
Compare this to the Death of Gwen Stacy. That was reversible, totally. But it was a story that turned out had legs, was good for the overall character and editorial sensed that and let it be all these years.
Anyhow I agree the Strange/Clea thing is intended to be reversible. And that means it was good storytelling.