Don't all of the top class hand-to-hand weapons have a similar restriction? Spharai can only get a triple proc on the main-hand (and even better, only the first punch of the main hand). I'm pretty sure I heard Glanzfaust only gets the Occasionally Attacks Twice procs on main hand, and now Verethragna only gets ODD on offhand. It seems odd that they'd do offhand, since the other weapons were main.