Yeah, the NA wording is pretty vague then. Will have to check it out when the game goes live, but +Crit Rate and Damage seems so broken, unless it scales extremely slow. Which negatively effects skills that rely on crit procs, and not necessarily the increased crit damage.
50% flat crit wouldn't be too bad.
Base Crit would be a 50% chance at 5% more damage. (instead of 5% chance at 50% more damage)