Answer: The deletions dealing with slavery and British were made for political reasons. Many changes as substituting "free" for "people who mean to be free" are stylistic changes.
Explanation: In my opinion, the Declaration of Independence would be more powerfull in Jefferson's original words, c'ause in your write we can identify clarity of causes that brings powerfull emotions for changes, that could be used, in that time, by people to reach your independence.