Do I have to use IMCE?
No. Acquia Cohesion 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.
Style guides provide site builders with the tools to create theme-specific settings which affect the style and layout of a website.
Yes. You can use style guides to create theme-specific styles.
The 'Edited' tag shows that the value of the field has been edited.
To create style guides go to Acquia Cohesion > Style guides
No, the entity browser does not work for component defaults as the entities are content, not config.
No site specific data is stored on the API.