or shadowmeld, i rather think alliance has better racials, shadowmeld is very powerful in pve(mythic+ death runs) and pvp, dwarves removing bleeds, even the haymaker of KT is pretty strong if used correctly in arenas or bgs.
races are the least reasion, why there is more horde in 2020, both orcs and troll racials got nerfed pretty hard.
All the big guilds are playing horde, in EU merely the raids guilds, but i guess in NA everyone is horde.
Most arena r1 players in EU are alliance, because they play organized and only arena, so they never see the negativity of playing as alliance, like most other players do.
Personally, i think the horde pvp colours are better, too, more a fan of red than blue but thats probably not the most important thing ever.