I don’t think Galactica needs a staffed baggage hold. The system currently employed is efficient and secure and I wouldn’t see any reason to change it to be honest.
If theft of bags from those cages on Air [as it was] & Nemesis is anything like it used to be a few years back, then they are anything but secure. Sure, there is CCTV but when you have anything up to 64 people [riders getting off & new riders getting on] converging around an open half of a baggage cage on Nemesis, you have practically zero chance of the CCTV catching the thief in the act in any detail.
The lockers to the left of the Oblivion entrance went for two reasons - (1) people nicked the keys as it was only 20p at the time to lock the lockers. (2) the lockers on the bottom levels got kicked-in & any contents stolen.