Well, that was an entirely amicable and otherwise unmemorable episode. I really don't have much of anything to say about it. It was nice to see Babs again, I think we can assume the Apple parents are dead and those song lyrics were terrible.
There's some other, much more cogent than I could manage, observations about the parent situation on the EqD comments; to whit, the two shooting stars represent Applejack's mom and dad. There's some other symbolism in the episode too with photos of two unnamed ponies hanging on the walls that seems to indicate the staff intend her parents to be deceased but they aren't addressing it directly for whatever reason.