The full scene is simply a 15 second extension of the shot that exists in the movie as is. It's POV is looking in through the pod 'window' and Sulu is piloting and looking forward. Kirk is also looking forward and then looking toward Sulu as he says his line. Nobody is offscreen in the take to be making faces and in any case it didn't affect Takei's performance--he does fine. Whatever happened in close-ups or in other takes of the scene are not important to the take in the movie or the slight extension of the take. Takei and Kelley are good in the scene and Shatner is ok. It would have been fine if they left it in. Obviously Shatner could have done all kinds of things in other takes, but in the one that 'almost' made the movie--he didn't ruin it. You are correct, I'm pretty sure that once the movie was put together and they realized it was good --perhaps good enough for a sequel--they simply figured why leave in a scene that has no relavance to the plot--especially if any sequel will focus on following up on Spock's death--not Sulu having his own ship.