Yes, there’s a ninja edit window, I don’t know what it is, but I’m sure I can’t fix posts in that timeframe, nor do I want the risk of missing the window.
I’m not sure what would be simpler than being able to edit a post using the same conveniences offered in the normal composer, or even the composer we used to have in the admin → customize welcome email text area.
Beyond that, I’ll just do the simple edits (which most are) in the view we have now, and keep copying & pasting more complex posts into a new topic, which I throw away after re-pasting back into the to-be-approved post.
It’s only when I forget about how drag & dropping an image will cause me to loose any work that I really feel the need to come here & see if it would be possible to improve the overall experience by adding the composer I’ve been spoiled with in normal discourse use.