It does is a unbalanced map but it is still a fun map to play. Could play it for hours and still like it.
But since people can vote for maps, I think having the map is not a problem at all. If people don't like it, people just don't vote for it. Now we discussed it on the server with a few players and Cortex and Baserace were two maps that people liked to play. So I guess the players really do want it in the game.