The FPS is going through a major transformation right now. When I first started working for the security contractor, the FPS officers wern't even allowed to take home their weapons in my region. Now, they have off duty carry privs. They are preparing to hire an additional 800 this year throughout the nation as Police Officers, Inspectors, and Special Agents. They are upgrading training and equip with a focus on response to whatever their intell service deems necessary. You could be hired in GA and be sent to SF/CA for a week if they think there is a good chance of a major riot there. As far as "police work" goes, it will still depend on the area you are in. Here, we have complexes that go on for a few sq miles and they do everything from traffic stops to hazmat response. They are basically trying to create a para-military force for catch all response.
Law abiding citizens sleep peacefully in their beds, solely because dedicated men and women stand ready to do violence in their behalf.