It was extremely short. I never played the first ones dlc so I can't put in my two cents for the second part of your comment but even campring it to earlier dlc it was short. Pirates booty took a good amount of hours to complete and had so many side missions with a lot of new locations.
Gearbox didnt fall short because they didnt develop any of the dlc the workshop did same. The workshop developed sorcery on ps3 thats the last game I know of that they created. Also I think its pretty crappy that gearbox outsourced the dlc like this.
"Reality is merely an illusion, albeit a very persistent one" Albert Einstein