EDIT: I do have to say, it does help that BB-8 says the location is “need-to-know”, and how it seems like Rey relents and basically says, “if you can’t tell me where your Base is, then I’ll just drop you off at Ponema terminal”. Which helps explain why she doesn’t take them all the way there. It could raise the question of why Finn doesn’t tell her and would that make Rey suspicious, but the scene moves pretty quick and Rey seems to accept that she just might not be allowed to know. So either Rey assumes that Finn isn’t allowed to tell her, or that Finn doesn’t know because he is a just field operative or something.
That’s exactly what I was trying to convey with the edit.
A lot of what I am doing is super subjective and nitpicky, and even though I try to construct a logic for it the fact is that movies are a mire of subjective feelings and assumptions held together with music and goodwill. In the end the reasons for cutting or keeping a moment come down to the sum total of these feelings. For example, when my girlfriend and I first watched TFA we both immediately interpreted BB-8’s thumbs-up as a well-known rude gesture, and not because we weren’t sold on BB-8 but maybe because we were more invested in him than in anyone else in the scene. Personally, I wouldn’t react well if someone got in my face and admitted to lying to me, while simultaneously putting me on the spot to betray the trust of people for whom I care. Mission or no mission, that would get me defensive and angry, hence the interpretation of the rude gesture. I totally respect that this might not be the prevailing interpretation or even one that makes logical sense, but it’s the feeling that’s stayed with me and the deeper reason for this change.
And who knows, maybe later I’ll decide to keep the scene for one of the justifications you describe or for some other reason. My interpretation isn’t more valid than that of anyone else, hence the attempt at logic when making an edit to share with the community. 😃