Up to this point Harry's main threat has come from non wizards. Werewolves, vampires, demons, mortals, Fae ect. Sure he's had his run in with some magic wielders, but the main threats have come from outside the White Council. He hasn't considered the White Council as a real enemy in the way that he should truly develop magic specifically for combating mortal wizards.
Things have changed though in a big way. First, Marcone is now on the level of a skilled wizard, possibly Senior Council level. Second, Harry now must consider Carlos a threat, and has admitted to himself that Carlos is more skilled than he is. The big third is that the White Council has cast him out, and is willing to send his own grandfather after him.
Harry loves Eb but I think at this point he can't be certain if Eb would really come after him. Because he loves his daughters so much, he won't roll over for Eb. If Harry had no children I really think he'd simply get on his knee's and tell Eb to kill him if he thought he deserved it. He would rather do that then kill his own grandfather. But that's not the case now, he will kill Eb if he has to. He also has to know that the Council could send wardens after him.
Up to this point he hasn't had to think in these terms. He does now, he has to think of Marcone, Carlos, Eb, and the entire Council as a possible threat to him. For the first time in his life he has to really see other wizard kind as genuine enemies. I think he's going to adjust some of his abilities specifically for taking on mortal wizards. What say you?