Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes. You can create AMP pages that use the Layout canvas for content but there are a number of considerations.
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
You can style tables or forms through the use of base or custom styles.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.