Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
You have to upload a JSON file to provide the index of the icons within your chosen icon font.
There is no known SVG module that can be used with Acquia Cohesion.
No, the entity browser does not work for component defaults as the entities are content, not config.
You can use Elements to create content but we don't recommend doing so for multiple reasons.