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.
You can only add combinators to child selectors. Add a child selector and combinator will appear in the Style tree.
No. Component content entities do not have view modes.
Yes, the generated templates can be saved to the database.
You don't. You apply a Descendant selector. These use a (Space).