I personally think a light-weight implementation of HS' item system would fit in fine. The 'get money and upgrade' element does help get people to stay, which helps in sustaining population when (if?) you get it. DS was fine with turf before, flagging I never really liked there. A more intuitive spawn system (maybe a 'selection screen' on death, where you get a quick view of the map showing which parts your team controls and such) would also be neat. The whole !setspawn blahblah where you had to pretty much know the 'locations', as numbers iirc, by heart, wasn't exactly ideal. That said, the whole turf gameplay system could be expanded where you control parts of the map and slowly advance to the other team's base, and possibly then win the round or do something else neat. I don't know, just throwing out ideas.