With the recent change of the bow from bleed to poison damage (meaning less PvP damage because poison damage is reduced by armour), I don't think there's any BRP weapon worth using in their current state. They all have around the same power level as the Summerset PTS old Cloudrest sets (aka useless, I can't see them even being used in niche scenarios).
All the other arenas have really powerful weapons that are still used often (DSA = bow, dw, destro and VMA = bow, destro). However, I don't see any BRP weapons coming even close to them. ZOS should buff them to make them at least somewhat exciting.