JohnSnow
Hero
It becomes gradually more significant and at-wills become gradually less significant over the course of levelling.... doesnt it. So at what level are you wanting the wizards to completely outshine the warriors all over again.
Ah, but if the Essentials character gets stronger at-wills and encounter powers, the question becomes whether he has to have dailies in order to keep up.
Although I have had the conversation on the WotC boards that there are ways to get the rough equivalent of dailies by building in a power of the same level that isn't actually a "daily," but one that can be triggered, say, every 4 encounters (or however often the designers expect dailies to be used).
Such a thing would be mathematically equivalent and would be, on average, balanced.