I've just received my Essentials books. Perusing the Heroes of the Adjective Noun books, the classes have and receive at-wills, encounter, daily and utility powers as they start and level.
On the other hand, one criticism I've read of the Essentials series is that somehow the martial characters (at least) do away with the AEDU structure. For example, when I asked the question What does AEDU mean?, @Baelnorn commented:
a contrast would be some classes from Essentials (like the Knight, or Slayer, or Thief) who lack the traditional composition of AEDU powers seen in PHb1/2/3.
What does it mean to lack AEDU powers in D&D 4e? What is that traditional composition of AEDU powers, and how has it changed in Essentials?