The fresh start leveling was so much fun, having dynamic fights happening in all the various beautiful areas of the open world is unmatched by any other experience. OPR and Arena or other instanced pvp can be fun too. But nothing will ever beat the open world pvp in my opinion.
The best thing AGS could ever do for the PvP content is to create proper open world pvp incentive. Either by giving us pvp servers, pvp map events, or quest hubs with daily pvp quests (not influence push pvp quests) but regular daily pvp quests for decent rewards or pvp currency or something along those lines.
This is a video a made a while back about my pvp encounters from 1-60 on the RTA servers, OPR can never come close to the awesome small scale pvp you encounter in the open world.