I just used 32 as an example because the rotation server I play on is almost always full and it is a 32 slot. It works out pretty well. I personally prefer that large of a server because its more adapt to a friendly atmosphere. If you have 8 man teams, it becomes almost scrim like and competitive, and more open to raging/hating going on. And if NewPlayer11992 comes in the server and doesn't know how to plant the bomb, he might get pounded on by pubs and not want to come back.
Also, I think 16 is too small, especially if we're concerned about server rankings. It would probably have to be at least 24 to get considered.
MOST IMPORTANTLY , if you guys want this to happen, dropbox it with your opinions. Let leadership know how you think this would improve the division.