Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
You can style tables or forms through the use of base or custom styles.
Yes, you can render react components.
Yes, you can add custom functionality to your site through the use of custom Drupal modules, sub-themes, and custom elements.
Yes. If you're a developer you can create your own custom elements. These will appear within the 'Custom element' category in the Sidebar browser.
Yes. If you develop your own Custom elements you can use them within Components and make their fields editable within your them.