I have an honest question:
Why _isn't_ Essentials a replacement for pre-existing D&D4? Or to put it another way, is it really designed to exist in tandem with "core" D&D4 materials?
Will Wizards continue to print the PHBs, MMs, and DMGs? Will they continue to publish the Powers books? Will there be future books in these series, or will they be superseded by their Essentials counterparts? Do we know these things?
I had assumed that Essentials was a complete overhaul of D&D marketing (and to a lesser extent, design), as the combination of HotFL/FK and three PHBs is redundant and confusing. I had further assumed that Heroes books would replace PHBs and Powers books going forward, and that MV supplements would be replacing MMs.
To that extent I kind of understand the original poster's point; if one does not like the format or theory of the Essentials books, one is kind of hosed. It's much like not being fond of the Delve format that was introduced late in D&D3.5. As far as purchasing new books is concerned, anyone who does not like Essentials is not going to have attractive future options.
Or am I completely missing something?