You can use it to start a theme from scratch: https://github.com/thanosp/Skellie Or to bc-refactor an existing theme: http://goo.gl/CF0km
It does not force upon you another templating syntax. It's still wordpress but with proper, structured partials and should look familiar to ZF users.
It only takes over from Wordpress before rendering, so it should be compatible with almost all plugins.
I would like your feedback on it. Try it on a template or two. See how much code you can reuse.
PS: Enjoy the lack of functions in functions.php :)