You guys just hit the nail on the head: I would totally "sell out" if I felt like the book wouldn't lose anything by doing so. I don't fear just losing my "style," because I'm a publishing whore, too. I always kind of thought I'd add a robot-monster to something if it meant I could sell it. That said, the more I think on it, the more I feel like dimming it down would make it a different story, if that makes sense.
THAT said, I have been compiling a list of things I would have to do to do the rewrites on it, sort of labeling those changes based on how complicated or significant they'd be, which ones are easy fixes, etc. Once I put that list together, I'll see if that helps me decide for sure. I'm keeping an open mind.