After playing it both ways, I can say that my personal preference is for less zombies. The fear in the game before was not knowing if there were any zed around, creeping around deserted towns. Higher zombie counts take away from that desolation aspect, and increase the starting difficulty a ton. I think that there definitely could be more zombies, but they should be a tad slower and more concentrated in cities or in roving bands. Great mod though, looking forward to how things evolve either way. PVP is always going to be around, and it is a cool part of the game. You could possibly allow the creation of PVE servers, if people want to go that route. (I don't know if you can turn off friendly fire in ARMA or not)