I've debated doing that exact move as well, simply because I do enjoy making "incorrectly" designed code "correct", by either moving to a simpler model or utilizing a more tried-and-true way of doing things, and since no one wants to be in "maintenance" it might afford me some more freedom.

At a previous job, I would occasionally spend time on the weekend rewriting and simplifying code because there wasn't really a "maintenance" team and I knew the only way that it would ever get better was if I fixed myself on my own time. I've since drawn a line in the sand that I do not work for companies on weekends but I did sort of enjoy that process.