I went back to Lady Silva this week after not touching it while I was working on Bar (who happens to be her husband, but that's not the point).
I found a lot of things that I hadn't noticed, hadn't remembered, and possibilities for plot extensions just jumped out at me. It was like reading an entirely new story.
I've run into this before, where a book I haven't read for a while takes on new life after I've put it away. It doesn't always happen, but enough to create a pattern.
In any case, putting away an older story for a while gives me new eyes and a new perspective so that I can come back to it for the next stage of editing without all the old baggage.
Stories do take on baggage as they're written; assumptions made by the author, bits and pieces of dialogue that the author thought were perfect the first time around and they turn out to be otherwise. Characters change in the writing, but being able to identify those changes and determine whether they should stay--that's a whole other step above writing the thing in the first place.
I'm not to that point yet with Silva, but I think I could bring new eyes to a few of the others. Later. At the moment I'm having too much fun getting Silva, Yilse and Etin in trouble. They'll have to figure out how to get out by themselves.