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.
Google maps may not be showing if you have not set a Google maps API key.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.
You can use Elements to create content but we don't recommend doing so for multiple reasons.