Coming from optimization circles, it is actually well balanced owing to the competition of spells for concentration, which is the [i]real[/i] problem, in particular for the person casting. At lower levels it certainly holds well above its own, but as our repertoire of spells advance, it becomes harder and harder to choose which spell for which situation and its scaling as a whole tapers off. 

The positive aspect for us players is that Kyra appears to be a ranged cleric, meaning her concentration is less likely broken; opens up my opportunity for Brannor to instead use smite spells more or [i]Divine Favor[/i].