Previously, her ability would trigger from time to time, randomly. Now, she always knows the location of the enemy hero.
It was more interesting before; it gave you an incentive to level her up. Now, you can bring her to level 3 and easily track the movements of other heroes.
And another thing: regarding Valafar's portals. Maybe it would make sense to reduce the cost of the spell? 30 mana is a lot!