I'd rate Esoteric a bit higher. I think it accomplishes what it goes for, an unarmed magus, competently. It gets all it needs with the AC bonus and damage scaling, but I think the cherry is Ki Arcana. That opens up so many new options; the last time I saw something like that, it was a mythic ability. Sure, it's not going to be as optimized as a standard crit-fishing magus, but unarmed builds rarely are. Better someone goes Esoteric then tries to halfass a normal magus into unarmed.