I've been stuck on "Shadow Day" for quite awhile, to the point where the rest of my writing has stopped. For this reason, I have reluctantly revoked the story until I can develop a good resolution for it.
Part of the problem is the Breezies. My original resolution involved re-introducing the Breezies into the MLP universe and I was knocked a-kilter when the series decided to do this without consulting me first. (This is the second time the series has made me abandon a story; I was happily working on a story about a solitary shapechanger, and then the series introduced a whole race of shapechangers. And, try as I might, I couldn't figure out a good way to distinguish my character, the Munkydo, from the Changelings.) I kind of trapped myself by publishing the "Stormy Weather" bits; try as I might, I couldn't figure out a way to get to my desired ending without the Breezies. (Although, Diamond Tiara, Ponyville's new expert on the wonders of methane, had this idea for a stinky fuel-air bomb...)
A second part of the problem, which many of the kind respondents have noted, is that "Shadow Day" started wandering all over the place. Frankly, I kind of fell in love with the idea of mixing and matching the characters and their roles and I enjoyed trying different things out. This was fun for me, but I don't think it was much fun for the reader. I want to re-focus the story on the four main characters, Twilight, the Mayor, the Mayor's secretary and Pinkie. Each of them has something to teach the other and I don't want that little story lost amidst the sturm und drang of Ponyville battling a Storm Giant.
I hesitated over the "revoke" button for quite awhile, because I feel it is unfair to the many good respondents that shared their encouragement and thoughtful criticisms with me. But I also feel I owe them a better story than the mess o' pottage that I have produced so far, so I hope they will forgive me.
From this point on, I will only publish completed stories. No reader, I think, needs to waste time on some half-baked tale when there are plenty of other tasty treats available.
While I am working on other things, one project that I keep in front of me is a re-write of "The Boneyard." I originally wrote this for a competition and, as many of my respondents have noted, the story suffers for my attempts to compress the story below a word limit. I'd like to slow the pace of the opening down a bit, spend some more time describing the setting and the characters, particularly the revenants. I want to include a scene I wrote about the impact the of Come to Life spell in Equestria, but had to cut for length. "The Boneyard" is my "Earth Ponies are magic" story and I hope, with a bit more work, to help you feel what I felt, when I realized that Earth Ponies, across the span of eons, still see each other as family.