Here's my opinion
^ not enough cops on to sustain both stations and divisions effectively.
This seems like a nice concept, however this will definitely effect how divisions operate outside of city limits when they are able to.
GD officers could be out dealing with the little rebels we're barely being able to fight on ops nowadays.
I personally believe it's a granted privilege as a divisions officer to have priority of fighting rebels outside of city limits.
Also, it could possibly cause unnecessary changes such as a new minimum number of units required in BOTH stations for divisions to head out on ops.
Eg; Currently it's 6 whitelisted officers and 1 Sergeant's presence to conduct ops. If both stations are utilised frequently, it will immediately half the cop population if put to trial. however in the situation where there are 14 cops on, 5 of them want to go on ops, however 5 of them gone would reduce the population down to 9 GD officers. It won't be possible to run two stations with those little numbers.
The way I see it now, is that when there is an excessive number of cops (X), the stations do get utilised. however as you pointed out, this is a monthly occurrence. no point changing it really.
Another thing is, this somewhat resembles Global Operations which just consisted of GD officers having majority of the map covered, overwhelming civilians conducting illegal activities as well as big rebel gangs. The cop to civ ratio is not the best as it is. I believe this would be another thing to complain about the cop/civ ratio, how cops are now overpowering the entire civilian population due to such coverage.
Splitting stations is fine in certain circumstances, eg;
civilians overpowering Sydney -> armoured patrols -> switching stations.
cops flooding Sydney (15+, etc),
no activity whatsoever within Sydney
Summary; Brisbane being the main city all over again. Cops everywhere, rebels hated it and dropped activity.
Feel free to critique