While Good Tonight is a nice song, I find it would make GOT7 enter that generic boy group route that most idol groups seem to follow had they chosen it as their title track.
Imo, choosing "A" for their comeback song was the best choice for JYPE because it's cute (without being sickening and still giving off a cool impression) and still has that hip-hop vibe that GOT7 defines their sound to be. A summery, more public friendly song like this is a surefire way of gaining new fans and more public recognition, which is what JYPE wants.
