I'm sort of shocked at the negative reaction this project has elicited. When I first saw this work, I was thrilled.
When I popped the hood on my first big WordPress project a couple years ago, I was appalled with what I found. Modern web frameworks have converged on a MTV- or MVC-style development style. Writing code in WordPress is like travelling a decade back in time.
This project is a very thoughtful effort to keep all the best of WordPress, while replacing the backwards template system.
I suspect that the ire this has drawn is the result of developers in the WordPress community not crossing over to other languages/frameworks. Anyone who's made a website in Rails or Django would feel right at home in WordPress MTV.