Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, you can build mega menus using Cohesion. Building mega menus requires advanced knowledge of jQuery in Acquia Cohesion and CSS.
No, the entity browser does not work for component defaults as the entities are content, not config.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.
Modifiers allow you to apply styles to an element when a specific class, id or attribute is present.