I think it's fine. It's the start of showing the characters that really come into play during the next movie. Especially Ginny and Neville since they're with Harry during the climax of the fifth book. I think if the director cut that out, we would be confused at where was what. Everything has some significance. Even if it's just Neville and Ginny having more dialogue. The twins, well they were just so entertaining so that was good.