Though more seriously, I do feel that XIII's ATB system has been sped up to the point where its lost touch with the entire premise of what ATB is suppose to be. Making tactical decisions with a selection of skills, in a semi-real time battle. In 1991, with FFIV, I controlling the flow of battle and making decisions while the computer did all the tedious background work like raising my stats when I leveled. Nearly 20 years later, the computer is now making all the decisions in battles, and now I'm the one manually controlling the linear growth of my characters.
