You've only been on the boards a month, I don't know how long in the game. It was quite a long time ago that they added the present map in the DA. Originally it was just a bunch of paired bases with differing alts for the bases so there was no need to climb. When they made this new map, they got the approval to add the "fighter town" section for just that, a furball area.
For awhile it was a good place for "quick fights", and there were players with a bit of class and didn't gang and such. Then the trash showed up, pretty much around the time when they closed off the 8 player rooms. Lots of people bit the bullet and started paying for the game, but soon found out that in a fight they really suck. They were so use to playing with other people who sucked that they never needed to nor wanted to get better. They were always getting "dead" in the MA's, but they could run their little gangs in the DA.
Instead of trying to get better, most of these people hang around in the DA and cherry pick others in their Tempests killing the fun of those who are trying to have a quick fight. The only way to make it a good place to hang out now is to severely limit what you are allowed to do and have someone in there to monitor the "goings on". HTC isn't going to waste time and energy on such a small group/arena. They have a lot more people to try and keep happy in the main arenas, and through out the special events groups.
So in the end, the DA is what it is, and it really isn't going to change. HTC said they would like to open the 8 player stuff again, but make it for the paying crowd, hosting the arenas themselves to control the software. Maybe once that happens the rif-raf will move out of the DA and the furball arena will once again be a furball area.