Metal Gear Solid V: Ground Zeroes

A quick topic I want to bring up! There are many complaints about the new MGS game, and how it's too short and there is not enough playing time.
You have to take into consideration that it is a prequel, for the main game (Phantom Pain). True MGS fans, would not complain and just be happy that there is a new game out. Sorry for this rant, but thank you.