As theme developers with over 10.000 sales on themeforest we know about WordPress and we have experience in managing hundreds of themes.
Visual compositor is one of the tools we use to create our themes, we are also part of the restricted group of beta tests for new versions.
We recently created a plugin that represents well what we can do with the visual composer, if you want to know more about visit please: http://extension.pixelthrone.info
Here's a brief description of this service:
- Create New Add-ons
- Add New Options to Existing Add-on.
- Customise Add-on appearance.