A friend read the article and one thing he said was safe to share is that executive producer Julie Plec says that there are 9 "Oh my God" moments in he finale.
As for spoilers, I hate sites that ruin thing by not posting spoiler warnings. But even when they do, it can still ruin the surprise because so few people seem to stay away from them. There was a poll regarding reading spoilers on a site that I used to visit, and the vast majority of the people voted the option that said that they absolutely have to read spoilers so they can know what's coming before it happens. Huh? Whatever happened to enjoying the element of surprise?!
I'm just glad the original DS was on long before the world became spoiler crazy because no one ever knew what twist was around the corner or what character was going to be killed. It made for many thrilling days of edge of your seat viewing. That sort of excitement is lost on much of today's audiences. And no one can convince me that today's audiences are in any way the better for it.
Now, something like Plec's remark is great because it doesn't ruin anything and it makes you want to watch. If only more spoilers were that unspecific...