To attract new players, you need to make it easier. You need to give newbies a chance. I suggest trying old settings.
That's the one-bomb kill settings. Is that the setting the zone was at the very begining when SWZ was trying to grow and attract players as a new zone? It's the setting I first started playing SWZ. It gives newbies some lucky shots. Or at least the ones that don't have flying skills but still have some aiming skills, some chance of wining.
Newbify it. That's the wining formula for fast kill (death) zones like trench. It doesn't have to be something that changes weapons/ships settings. Pball's small map attracts newbies because smaller maps means faster scoring, less thinking ahead, and more instant satisfaction.
Even long running commercial multiplayer games were newbified to help attract and keep new players. Counter-strike's hitboxes used to be much smaller. After it went retail and v1.5, the hitbox were enlarged and headshots became much easier so newer players can hit the head almost just as often as seasoned vets.
Day of Defeat's BAR used to be much harder to use because it kicked a lot. After the retail release, they made that gun easier to use. And probably some other changes I don't remember.
Natural-selection used to be just regular base-building ns-style maps. But its learning curve is pretty steep so the creators introduced combat mode where you don't need to build bases and just kill enemies to level up to buy new equipment and weapons. Combat maps for ns is like War3's Defense of the Ancients for a first person shooter. Much easier with more action.
The return of old settings would probably see mostly center killing. To encourage more flagging, you can try making the map really small with only 3 bases and no center. Those variable maps are really cool.
The incoming newbies would probably just be a trickle, there's no saying how long they'll stay when there are larger populations to play with in other zones. But if the settings are easy enough at least they won't be turned off as quickly.
Once your ready for the new debut, you can always "crash" the other servers for a couple of days to divert players here.