StalkerRP would be a good alternative considering it can provide the same action that drives the WW3RP base due to Duty/Freedom wars, Monolith raids, player-made mercenary groups, the military faction as well as independent bandit groups, as well as dealers to provide equipment beyond what's earned in events and 'expeditions'.
Ultimately, it adds a lot more player agency to the mix, adds NPC threats as well as takes on an interesting atmosphere that's perfect for half the maps used for WW3RP in the first place.
The only issue that would get people up in arms (or potentially please) is the absence of females outside of well-developed character applications. I remember a fem-char that went into the zone after hearing rumors of a wish granter anomoly that she was going to use to cure her child's terminal illness (I believe it was cancer but I'm not sure).
Basically, it takes what people enjoyed about FT/QZ RP, adds two warring factions, as found in WW3RP, makes STALKERs (civilian characters with an actual reason to flag on/play civilians, unlike in WW3RP where there's little incentive to play civ chars), creates a player-run economy by adding arms dealers and other types of flags which could be unique, giving each entrepreneur their own unique advantage (I.E. tier progression system, allowing more experienced traders a reason to work hard and be active) and freedom for event staff to create raids/infestations/missions/expeditions with risk and reward to keep people interested and work to collect/pawn anomalies.
It also gives every character a feeling of arc and adventure as they try and find their way in the zone, either staying indepedent, working for a mercenary group, joining FREEDOM or DUTY to fight for their respective beliefs, become a trader and try and make as much money as possible for their own reasons within the zone, or simply live for fame and try to become a legendary STALKER.
I don't know if this resonates anyone, perhaps I should just get out of here.