Thanks for the plugin! I was wondering if you are planning to continue development of this plugin once TinyMCE 4 is shipped with WordPress 3.9 or if it will be discontinued by nature of the TMCE overhaul.
Either way, I'd love to contribute to this plugin's development. My primary reason for this is that I'd like to allow developers to filter the default variables in props.js.
For example, I was hoping to be able to filter the font family select to include only those fonts which adhere to the style guide I build with every site.
Ideally, all 'defaults' as they exist in the props.js could be filtered, allowing for style-guide specific styles to be added to TMCE, giving clients control while giving them a way to maintain continuity throughout the site while editing.
Thanks again for your work on this plugin!