If you belive in magic
I saw a rouge with this just yesterday.
That weapon is seriously awful for a Rogue. Look at the attack speed. It's
way too fast to be of any use as a main-hand sword (it could be a decent off-hand, but there's absolutely no point in giving that to a rogue even before a hunter). My Bloodrazor has a higher damage range...
A rogue had that in my PvP group yesterday.
This particular set isn't actually that impressive. The highest rank required for every piece is Lieutenant Commander, which I intend on getting in the foreseeable future. The truely identical "tier 2" set requires Field Marshal, which is much higher.
In any case, I'm in the 40 - 49 bracket. I'll have to move up after Knight-Champion (I believe), because that's the cap for that rank. I'm hoping to make Knight-Lieutenant (which is the boots and the gloves), but I'm not entirely sure I'll make it.