I'm working on a layout (oUF...) just for PvP (arena and battlegrounds). It contains a whitelist for buffs/debuffs that only shows PvP relevant buffs/debuffs. It also has built-in arena frames (they look exactly like the party/raid frames on the left), which can serve as an alternative to Gladius.
note: group frames look like that for up to 15player groups. Larger groups get different frames (most likely the same layout I'm using for oUF_viv).