Great article! I'm happy to see that more and more theme shops make the right choice and start developing good looking themes without the features madness. I have a question tho. How is possible to keep the content portable between themes if some of them use custom page builders? Take a look at this one for example: http://theme.wordpress.com/themes/basis/

I really like the flexibility that page builders give you... but isn't that one of the reasons why most of us don't like Themeforest themes? (The garbage code it leaves after you switch themes)