if there were to be more civi slots added there is the potential that the server would fill up completely with civilians, (if no cops could join a space). If you know what i mean about this.
So my point is a second server is needed, but after reviewing other servers ways of dealing with this, there is either more servers which means there are about 40 people on at each time. Such as the servers in-which initials are ... , 3 letters. I think that this would not work for our community because even when there was 2 servers most people wanted to stick to 1 anyways.
The only suggestion i can give is for perhaps players to gain an advanced membership either through being a forum member or maybe even donator, this means that a police man would have the ability to kick "non advanced" members out for their own position, or to give designated slots, i don't really know as this sudden surge as hit us all as a surprise (i think)
Just some things to consider.