I would suggest making both servers with less max player count so people could spread out over 2 servers , this way i think lagg and desync will be reduced , police commanders could order half of online officers to go to second server when needed
Teamspeak would be great to communicate between 2 servers and monitor police activity , this way nobody has the annoying issue that they cant connect to server cause its full all the time
I think this will greatly increase player happyness