Diablo 3 Warcraft PVP Arena suggestions:
Number(#) of players 2-6(max 3vs3) => 2-10(max 5vs5)
Heroes should have their male/female counterpart so that 5vs5 will look very cool
Balance some skills ex.(teleport - no cd when fixed, locusts swarm - unable to heal)
Change some skills ex.(cleave - very melee, slow casting animation, battle rage - requires rage points, short duration 4secs, 30 amplify damage)
Every escape mechanism skills should have minimum same cooldown ex.(teleport, ghostwalk, vault, leap attack/ancient spear all that should have a minimum of 3secs so that there will be no spamming like teleport with rune will damage AOE.
Barbarian disadvantage - very little mana/rage points, ancient spear slow cast animation Monk disadvantage- has no escape mechanism
Witch doctor I see no disadvantage
Wizard I see no disadvantage
Demon hunter disadvantage - skills inflict very little damage.
Visuals suggestions:
ancientspear,furiouscharge make it more like the game.