I think I mentioned this before but I don't think the bulk of the core characters should be on a first name basis yet.
An example being the 'WWSD' clip where Kirk is talking to Chekov and says he needs to beam 'Spock' back to the ship. He's talking to a subordinate and should refer to Spock as Commander Spock. There are a few other moments in the new clips and the first film where they refer to each other by name.
Kirk and Bones, when talking to each other are OK (IMO) to refer to each other by name. Their rank and friendship make this appropriate. The others have not known each other long enough to forgo addressing their superiors correctly. They need to work up to that familiarity. Again, IMO.
Just a little something that bugs me. lol