Alliance is unarguably the stronger faction for PvP, especially because of humans incredibly strong racial ability. This wouldn’t be an issue if arena titles worked the same way as ‘Hero of the Horde’, and ‘Hero of the Alliance’ titles does for RBG (Rated Battleground). The title reward from being a top player in RBG is faction restricted, meaning you have to be within the percentage of your faction - and not by all players. As of writing this post NA and EU has ONE singular horde team each in the top 50 ranked players in the 3v3 bracket - which is now the only bracket possible to get Gladiator and Rank one gladiator titles in.
Hordes only competing against other hordes for their gladiator titles would be a lot more fair, and way easier solution than to try to balance the factions.
On the topic of PvP titles, I find the RBG titles extremely boring. Every RBG season it’s the same title, ‘Hero of the Alliance’ over and over again. Name them after the season instead, encourage people to keep wanting to get more titles instead of being rewarded the same title they already got a dussin of times. How cool doesn’t ‘Vicious Hero PlayerName’ or ‘Ruthless Hero PlayerName’ sound?!