The phrase "as previously imagined" is correct and usable in written English.
You can use it when referring to something that was thought of or envisioned before the current moment or situation.
Example: "The project turned out to be more complex than as previously imagined, requiring additional resources and time."
Alternatives: "as once envisioned" or "as earlier conceived".
It seems that the bond holders and investors who broke out the champagne when the Irish bank guarantee was announced were in London, not Berlin or New York, as previously imagined.
On reaching the other side of the room, they suddenly see themselves in a mirror, and realise that the seemingly circular space is in fact semi-circular, and that everything is half as wide as previously imagined.
We've already confirmed that the ending isn't as altered as previously imagined, but there is so much more to unpack within the 149-minute fever dream.
Although the breadth of the sample can not make the data itself representative, as we previously imagined, the vast majority of these publications, refer to higher education experiences (13 of 17).
They did not, as I'd previously imagined, have the power to undo me.
They did not, as I'd previously imagined, have the power to undo me.
Weisskopf doubted his own "hero" status, as heroes usually do, and as a journalist he was more deeply embedded than he could have previously imagined, a participant as well as an observer.
These staple crops could face rapidly dwindling yields past certain thresholds, placing us in a far more precarious situation than previously imagined, as pointed out in a February paper by Frank Ackerman and Elizabeth A. Stanton.
In any case the greatly feared potential "haven" for Al Qaeda in Afghanistan turns out to much less important than previously imagined, as a potential threat to the United States.
While I've written previous articles about special access, with the uncovering of new data (and with the help of other analysts and auditors) it is now clear that the problems are worse than previously imagined as the revenues and profits involved are 2-6 times larger than others have been quoting.
Incorrect endorsements of a previously imagined caption as having been viewed were more frequent for neutral than negative captions, and both were endorsed more than new captions.
