I'm actually more of the belief that the information be provided on a need to know basis in order to actually do the job. Especially when most of the usage of it will come just from daily patrolling and random acts within the facility that warrant a rapid net to be thrown over the dome to ensure the safety of everyone else. There are enough people involved within the defense force that would be involved within this group to ensure the rapid containment with any individual that would cause problems normally.
There are problem vampires and non-problem vampires. Those listed as problems will likely land on the Defense Force Watch list, but even before they do they have to actually do something for people to normally become alerted to their presence as a vampire. With this second list, if someone is already watching them--there is less chance for them to take negative action. If it happens, the call goes out and those on this task force will take over. Their identity as a vampire has already been compromised.
The issue is with the non-problem vampires. Marina is anything but stable. Things happen that we often have no control over. Loss of access to blood, change of personalities, even spending time as children. What this would do is work like a general watch system in these events--allowing anyone that is within this group who is not affected to keep a closer watch on those that are.
For example the recent costume party--I hate to use her as an example but... had Yuuki Kuran been left to her own devices without the interference of people that knew she was a vampire and capable of the amount of damage she has the potential to cause on her own--we possibly could have had a lot more damage than a broken wrist and a hand in someone else's stomach.