Honestly I'm fine with them giving slightly new takes on the characters, and I don't think having June awkwardly swear like a thirteen year old (which she is) is even that much of a departure from her character in the original. It fits the kind-of dorky person who pretty recently became old enough that they are starting to worry about being cool. I only really have a problem with an overabundance of swears when it seems pointless and forced, and in this case I feel it does have a purpose in informing the personality of this take on June.