There are two things I like about this. One is purely personal: I’m sick of romantic subplots getting shoved into everything, and glad to see something that doesn’t have them for once. The other is more for others' sake: it creates a space into which viewers so inclined can insert interpretations of the characters' sexuality and romantic behavior that might not be supported by the text.
It makes shipping easier, in other words.
I, in turn, like this as a way of pointing out what makes a certain flavor of remix culture—shipping—possible and/or easy. I am also very fond of the dry humor of “interpretations of the characters' sexuality and romantic behavior that might not be supported by the text.” You know, most fanfic. It is notable and endearing that we’ve got the term “crackfic” for distinguishing between, “the scenario you posit probably isn’t supported by the text” and “the scenario you posit is impossible to support with the text.”