Anyone looking for a reason for Dansby's resurgence since his return to the Majors should look no further than his stance. Below is a look at two RBI singles by Swanson this year. The top is on June 23rd, pre send down and the bottom is from August 20th that plated Albies. 
In the top left picture, you can see Swanson in a neutral stance if not slightly closed to the pitcher. With his desire to be fairly close to the plate, this stance makes it incredibly hard for Swanson to protect inner half with any consistency or power. It's why Swanson either took inside pitches, or had an inside-out swing resulting in bloops or getting jammed and rolling weak grounders to the left-side.
Top middle, we see his hands separating from his body and his hip flying open. Swanson flies his left hip open to compensate for his closed stance. This is why he was having so much trouble early on with sliders from right handed pitchers. He was trying to clear his hip to allow his hands to come through.
Top right, we see his weight firmly on his heels with his rotation taking him to third base. Basically what you'd expect to see with two strikes (which he had in this count). However, with his hips clearing early, he is off balance has to flare it into right field for the RBI.
Bottom left, we see his new stance since returning from the minors. Slightly open, but not any further away from the plate. This allows him to see off-speed pitches better as his hips are naturally clearing (not fighting himself).
Bottom middle, we see him standing taller in the box, very little movement from his new hand position and because of his hips already starting to clear, his hands have a more natural path to the ball.
Bottom right, we see his rotational force being applied into the ground instead of to third base, allowing for more power.
Now finally, compare the two right images and where his front foot is in relation to the plate.
This new stance is allowing Swanson to recognize pitches earlier, let them get deeper and allows the barrel of the bat to get to the ball more consistently without sacrificing one side of plate or his power.
Now this is just a snapshot in layman's terms to give an idea of an adjustment he's made that's paying dividends in more areas than just hits. This new approach has allowed Swanson to slash .297/.395/.486 since returning to the Majors with 3 doubles, 2 triples and 1:1 strikeout to walk ratio (6/6).
A subtle change at the plate has made all the difference.