Respectfully, no, it's not the Fighter. It's very similar to the fighter in many ways, but:
- It shares essentially none of the same class features, but instead has new ones that are (or may be) similar but not the same.
- It has a (slightly) different list of class skills.
- It has a different range of armor proficiencies, including plate.
- It has a different progression of power acquisition as the character levels.
IMO, it's different enough that they would be better off just making this a separate class in the Builder.
-Dan'L
Respectful or not

-It does share the Weapon Talent class feature with Fighter
-if they do change the class skill list it may be an errata for all fighters or it may simply be "this build has these new options", not a classbreaker. There are feats one can only take with certain build options, why not skill lists?
-it only adds Plate, which is one feat; many "subclasses" or Feature selections include free feats. (Ranger has a lot)
-Yes, this is the main change in design theory with "Essentials" material is to give different progressions as an option.
The main reason it would not make sense to list it as a separate class (besides the fact that it isn't a separate class) is that all of it's new powers(and potentially class features) will be accessible to other fighter builds (per the essentials podcast) and all previous and future fighter powers and feats will be available to an "essential build" fighter.
I don't recall ever reading an article by a major company like WoTC that had a major public figure express frustration with it's clientele until I read the Essentials Wizard preview. These are not new classes. They are build options. Please... Nuff.