I liked nuke and dust in the mix, but adding too many maps might become a pain as the current voting system requires a large percentage for a map to go ahead, I remember when nuke and dust where in the choice making there 3 it generally needed to go to a 2nd vote to get a majority vote, if too many maps get put in the choices it might end up voting too many times?
I love cobble, its a good big map with plenty of spots to spread out especially when the server is full.
I'm not sure why dust and nuke were removed from the rotation, but it would be nice for a little change, but if admin doesn't want to add them in, it wont stop me from still playing on the server either.