I've received more feedback for Book 2. The latest will require a significant rewrite of a chapter that I personally liked, but that I now realize doesn't work.
I think most writers are sentimental about their writing. We write our first draft that's full of hopes and love, then we have beta readers or editors go over it, and WHAM! Major problems appear. It's sad, in a way.
One method I've found that helps me say goodbye to what I've written in favor of what I need to write is to copy and paste the old parts into their own document. This way I get to keep the original intent and passion that poured out of me in the first draft while making way for the better content.
Doing that gives me a sense of closure. For some reason, I need that. Anyway, that's where I am right now with Book 2. Wish me luck :)