Essentials only would not work for me, but essentials, is a great addition to the game...
I like the new martial classes... but I also liked the old martial classes...
But both designs fail in a certain way, actually thats the case with most of the classes:
You have too many choices at first level!
It really would be sufficient to pick a race and a class and maybe a build and a few skills and be done with it. And only afterwards, hopefully at every level, you get a little choice:
a new at will, a new encounter, a new skill, a new weapon talent, upgrading an encounter to an at will...
Right now I have the feeling, old classes allow too much freedom, as former power choices are meaningless, and i really feel it is a problem, when you have to take a new power, and there is no way to upgrade a power...
Essential classes don´t have this problem, because you don´t chose powers...
I like the design philosophy of the skald (though i do not totally agree wit the execution):
You can pick different powers, but you can upgrade lesser ones.