I looked into it a bit, and apparently this isn't really Necromunda as I remember it - it's something new. Out of the box it's a board game, with optional rules to expand it to a tabletop game. Funnily enough, Shadowar Armaggedon is basically old Necromunda rules (including terrain) but with generic 40k forces and not gangs. So maybe they shot themselves in the foot with an actual Necromunda ReRelease, and had to make something different since they already cannibalized the rules for SWA. Anyway, who knows, maybe it's a better game!