Dropping Mermaids

I've been writing,writing,writing between other obligations and have learned a lot. I handed in the Flying Boat synopsis to a publisher and they said it has too much plot and the best part was the themes I described at the end. I was most worried about the themes actually. So I've been rewriting it, trying to make all the action relate to the characters goals and the theme of the story and a far superior comic seems to be emerging. But one that makes me more nervous to send out in the world because it's more revealing then a bunch of clever plot twists would be. The toughest part is letting go of things that no longer fit, like the above mermaid character. However, this means I have enough material for fifty books.