Indeed, Wilum, I think you're right in this: we are seeing... not an abandonment of the Mythos, but of the hidebound idea of what the Mythos is or stands for; a use of Lovecraftian concepts, ideas, themes, and even locations or characters or entities, without any attempt to "write in the manner of the master"... which is very much the sort of thing Lovecraft himself wished people to do: to write what is in them, not imitate him; and not to get stuck in the semi-official Mythos dogma, either. As a result of this more recent (and reasonable) trend, we are seeing a much wider variety of types of Lovecraftian voices and tales; people who are obviously influenced by the man, but who are very much going their own way... yet in doing so, oddly, they make the connection all the more genuine, I think, and notable. It is like Poe: many, many writers have been influenced by Poe (practically all modern writers of the short tale, in one way or another, if only because he essentially created the short story in its modern form), but very, very few of them attempt to write like Poe (save for parodies or oddities such as Bloch's "The Man Who Collected Poe", which are another thing entirely), or use directly and overtly his own themes, etc.
In the end, I think this is much better for both those writers themselves and for Lovecraft's reputation as an influence.
I've not yet had a chance to read the book (I only received it in the mail yesterday), but I do look forward to the experience... and to your story in particular, I must admit (though I am also anxious to delve into the pieces by Don and Mollie Burleson, Michael Cisco, and several others included in the volume).
And, as both Nesa and J.P. have mentioned: congratulations, and long may this trend continue....