Do I have to use IMCE?
No. Site Studio allows the site builder to select, either use of IMCE or Entity browser for browsing and selecting images.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, the component link field supports both internal and external URLs.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.
You can create more than one template to provide layout and style alternatives with the use of the template selector.