So in short, excluding DocumentContent from search isn't possible?
I do wonder what the purpose of the Page tab is if a user is only allowed to place widgets there. I personally like the in-page editor and have no problem with users creating rich text elements. The form tab isn't very user friendly in my opinion.
Kentico documentation states: The Form tab is used for editing the data related to the document (Document name, Publish from/to, etc.) or its structured content.
I don't understand what is meant by 'structured content'?
Anyway, in this case I will use a custom doctype and define search fields. That way I can exclude pieces of content.
Regards,
Martijn