Prime Directive in the 24th Century
On some of the mission orders seen in "Conspiracy", three starships were sent to investigate the pre-warp civilization on Gamma Argus II. The captains were given discretion in making first contact with the native civilization.
Relationship between Spock and Surak
In "Journey to Babel", it was learned that the relationship between Spock and Surak became strained after Spock chose to enter into Starfleet. It took a series of events aboard the Enterprise
to change the trajectory of the relationship.
One of the changes I feel that is being reflected in this new iteration of Star Trek is the loss of character for the Enterprise
. I feel the ship is used either as a backdrop to establish scenes or as a disposable vessel to transport the heroes.