I don't think a wipe resolve those populations problem of the server ... even if i like wipes.
For my two cents ; i think a good solution for attract people is doing more little collectives circonstances; caravans are a good exemple : each X hour caravans start a trip in a town, players can join it and defend the caravan with NPC guards, or if they are raiders they can attack caravans with NPC raiders and other players raiders.
If the caravan go safely to his destination, barters of the towns have some supplies, guards players have some rewards (caps, reputation, good XP (like 10kxp) and little stuff) and the faction who control the town have somes bonus too, if raiders win, they rape the supplies for Raiders faction (and lost reputation), raiders barters have more supplies, players gain XP and stuff.
There is enought towns for a lot of caravan by days, that want say the caravans are small pvp/pve circonstance, not like TC with big gangs. It may be more accessible for all players : no big organisation needed, no evil stuff needed, etc ...
TC will be forever the best way for big rewards, so, big factions continues to TC with big organisation etc.. No offense for gangs! This really a big job to do TC ...
There is no way for fast relog, caravan is a trip for only one character by player. If you die, you lose.
It's just an idea who surely be lost in the forum ... More i play Fonline, more i think fonline need some little quests like that with challenge pvp/pve with others players.