They should re-add crucible to the pantheon. That map is designed for smaller fights and is still a fun map.
I think it is in there, but they greatly reduced the odds of a 1v1 match launching on it. Here's the info from t-man from another thread:
There are some timing events in the matchmaking code but none that involve when is it a good time to make a 1v1 or XvX match.
But I have done the following for now to help reduce the number of 1v1 matches.
1) Increased the time interval that it tries to create a match from 4 seconds to 7 seconds. During each match making attemp a random throw is done to determine what map is used. By increasing this value the chances of getting the Crucible map decreases.
2) When getting a map there is a weighted value for each map that determines the frequency at which the map should be picked. I have slightly decreased this frequency as well. So this to will decreate the chances of getting the crucible map.
So we will wait and see how these new values work. If we find that its taking way to long to make a 1v1 match then I will need to look at adjusting those values back towards their previous settings.
So, I don't think they simply remove any maps from rotation - they just toy with some values that siginificantly reduce your odds.
And here are my last Panth games (in terrible format) - I've only had 1 game on zik, but I know it comes up a ton: