Very many people post opinions without considering the other side.
Wouldn't you like to dodge out of a corner with 3 people beating you down? Im assuming yes, and you can.
Grapple is inconsistant but maybe 20% of the time. You cant grapple them during the roll animation only the short period after.
Sprinting grapple is simple if you're in a wide radius...you can even pull them through walls.
As if 3 vs 1 beat downs weren't merciless enough you'd like them to be unescapable? They pretty much are already. Right.... because that would make the game so much more fun for less then competitive players just looking to have fun. You gotta cut a little slack somewhere.
It just sounds to me like you enjoy the "Pack Attack" tactics. The sprinting doesn't need a cool down either. In 4 vs 4 FOTG those maps would such a drag if you had to keep sprinting, cooling down, sprinting, cooling down... not to mention the extra wear and tear on your L3 button.