Probably because GG has lots of gauges (Burst, Guard, Tension, and a Charge or Time gauge for certain characters), and Tension is used for a lot more than just specials (Specials, Instant Kills, Faultless Defense, Slashback, RC, FRC, Force Breaks, Dead Angles).
EDIT: Rossatdi: As I said, I'd rather lose than have a boring game, which means yeah, I do have a lot more trouble with mashers than other fighters 'cus I refuse to just sit there spamming BBB or 6A+K.
EDIT: Rossatdi: As I said, I'd rather lose than have a boring game, which means yeah, I do have a lot more trouble with mashers than other fighters 'cus I refuse to just sit there spamming BBB or 6A+K.