To what Xray said: Yes, we used to have it, and Xray is right. We took it away because the same maps would appear on the RTV list every single time, and so nominations were removed so that there would be variety. However, this is something that could be brought up again, in a poll, as long as the CL doesn’t object to it.
Just remember, when we had nominations, d2 was played like every 3rd map. Also, because of the rtv system that is in place, the current map is changed to the rtv’d map, not the next map, which allowed maps to be played twice in a row with some regularity.