They don't need to retcon it right away. When you try to spend a bunch of time unnecessarily fixing stories that are dumb, you get everything that was wrong with Spencer's run. It should just never be spoken of again and consigned to the dust bin of history unless a convenient means to retcon it comes naturally to the fore. It was such a bad idea. It robs Norman of pathos. It robs Harry of pathos. It robs *both* of them of agency. And don't even get me started on the way this makes me uncomfortable with regards to Norman and Harry's mental illnesses.
Just bad all around, and I imagine most readers have already forgotten about it and moved on.