Method ran 2 arms warriors on their first mythic imperator kill, Paragon ran a fury warrior I believe.
I'm enjoying playing gladiator because I don't have to bounce specs. AoE, passive cleave, and single target are all substantive and not greatly affected by movement or dependent on procs.
It's true that the APM requirement is higher on glad, but it has the advantage of being mostly muscle memory versus the proc dependent fury or the rage dependent arms.