This era is not my strongest suite (the Epic Collections haven't covered it that well yet). I suppose there is a degree of subjectivity involved as to how much build-up there should've been. Some people might want more, while others might find that the set-up that they were in love with each other (but kind of not admitting it to each other or themselves) to be enough for what we got.
I was thinking more in the grand scheme of things (MJ was never supposed to be Peter's long-term love interest, much less his wife, but when re-reading the older issues, we see it as part of the story that lead up to the wedding despite it not being the original intent).
I don't know. Kinda same difference if you ask me. In any event, I don't see how any alternate path to OMD is "better," given that I object to and utterly reject OMD in and of itself.