Okay, I tried to post here earlier tonight and it didn't work... so here goes again.
I totally loved this moment. It was very sweet - and sort of a return to something they've both been missing. I also think it is interesting that some of the best stuff from this season -so far- from the S/V ship point of view has heavy call backs to S2 (with WTLV) and now S1 with this episode. Very cool.
I just loved the emotional carry through all the way throughout this episode. The S/V scenes, the Syd/Marshall scenes, Jack being Jack... the whole team being thoroughly distracted on Sloane. And especially some of the scenes with Marshall, Carrie, and Mitchell - its about time!
Here's something else I noticed: At the beginning when Syd was on the mission in Havana, the guy said "You dance like an angel." and Syd replied, "Yet my feet touch the ground." Then later, after she and Vaughn had talked about going dancing, when she was in the coffin and she was fading, Vaughn said something about how they would be dancing in no time (Syd, Marshall's on his way...) and then she said something, which he could barely hear, before her phone cut out which sounded to me like, "Just let my feet touch the ground..." and Vaughn was kind of like??? I liked that when I watched it again, it was her way of saying 'I don't want to be an angel, I want to be right here on earth, feet on the ground, in your arms... I want to live.'