I like Narset less in control decks and more in Jeskai tempo/burn (whatever). Rebounding hordeling outburst, stoke the flames, and jeskai charm seems powerful. The same deck can also rebound dig, though I think that is pretty win-more. The +1 will hit fairly often. Dragon fodder (2 mana 2 goblins) might make its way into the deck as another spell that's actually a creature.
It also ups the threats for that deck: it will have a problem enchantment, creatures, and a planeswalker.
I think it's less exciting, but still a possibility, in U/W heroic too.