This particular item that appeared on some stream is worrisome , we know that everything in the demo is a reflection of what classic will be in its entirety and everything we've seen + what blizz said confirms that.
+1 crit rating or any secondary stat "rating" increases were definitely not a thing and most gear that granted 2ndary stats were high lvl gear that displayed percentages, like 1% extra crit etc, not crit rating.
The fact that this item is in the game for low levels means one thing, that itemization will be completely different, this itemization might change the entire balance of how some specs are considered viable.
A warrior who is able to get crit gear while leveling isn't going to be as slow as the class is expected to be during that stage of the game, in retrospect of some specs like balance druids and other specs that were considered non-viable at end game might see a difference in performance if other 2nd stats are available, like extra mp5 on items that shouldn't have said stats etc.
Overall it seems like the endgame gear progression might be severely different than what is expected of a normal vanilla endgame environment and the balance of class power will not be the same.