You mean options that ONLY PH1-3 characters can take that are somehow forbidden to Essentials characters?
Why would they want to present options like that?
Generally speaking, the more characters that can gain an option, the more broadly useful (and thus valuable, in terms of page count, design decisions, and book sales) it is.
If I'm WotC, I'm not going to want to provide a book with options ONLY for beastmaster rangers and wand wizards.
I'm going to want to provide a book that potentially has options for ANY character. ALL characters, even. That way, the dude playing the Ardent and the lady playing the Barbarian all get something that provokes them to buy the book.
I think that's part of why we're not seeing the Power Splats at this point.
Martial Power 3 is a non-starter for anyone not playing a martial character. Its options are too exclusive.
Instead, we're getting
Heroes of Shadow, which is hitting a broader base. Perhaps not as broad as it might be (Shamans? Runepriests? Beastmaster rangers!?!?!), but pretty broad nonetheless.
That is a good thing.
A book whose rules I can use (whatever game or character I happen to be playing) is a very good thing.
Edit: The place for the narrower, more limited options, are the magazines. If you really want more cleric at-wills or implement masteries, I'm sure they'd print a good article with that stuff in it. Personally, there seem to be plenty to me, but everyone plays this game differently.