Striker in pvp is one thing, but a striker in pve is another. A fist of havoc in most instances is a one shot kill for majors and ads. But it's not really useful for boss fights due to the need to be somewhat close. Also the two other subclasses are much better suited for pve. By giving it some type of roaming capabilities while maybe condensing the AoE they're trying to make it a little more viable for pve activities.