I doubt that Eb used the Black Staff to drag that satellite Ortega's head, this is the guy who had something to do with Krakatoa blowing up.. But then again, maybe he use it for that too? 
The Blackstaff was used in Krakatoa, and on Ortega. Ebenezar confesses to it when he is revealing what he is. He doesn't outright tell Harry about the actual staff and it's functions (although he should have as Harry might not have been so mad about it). We only find out from Jim that the Blackstaff protects Eb from black magic. I don't believe the books ever state it which means Harry just accepts that Eb violates the laws of magic with no protection. But as far as we know, Eb would have used the Blackstaff's power to insulate himself from the corrupting power of dark magic. If he didn't he would look like a raving mad warlock, wouldn't he? Curiously - when it comes to senior wizards it seems some don't look completely foaming at the mouth crazy (like Grevane or Corpsetaker) and seem to be relatively normal (like Cowl and to some extent, Kemmler).
Morris - I think this was discussed way back and Jim said the angle is wrong and needed to be rotated 90 degrees. Which is to say - Mother Summer is the Crone, Titania is the Mother, and Sarissa is the Virgin (or whatever format you like) AND Mother Winter is the Crone, Mab is the Mother, Molly is the Virgin. My point (and Jim's implication) is the Fates were split in two. There is the Summer Fates and the Winter Fates. I have no idea why. My only guess is that the God (or Gods) that they may have been or absorbed had to be separated due to some stipulation around Outsiders and probably humanity. There has to be a polarity, or perhaps better to say a duality. I am sure it will revolve around some cosmic metaphor. Light and Dark, Yin and Yang.
It gets even more complicated when there are also clear Judeo-Christian themes involved. The teeth in the cottage representing the Four Horsemen (as some have guessed) and the artifacts/weapons of the Christ in Hades. Further still there other themes - the old Cottage itself is reminiscent of the witch in Hansel and Gretel but also Baba Yaga's house and many other such folk tales. There are also strong connections to Scottish and Irish mythology beyond the Faerie stuff. There are many references to other European (particularly Norse and Slavic) mythology and of course the Three Witches in Macbeth, the Grey Ladies, the Triple Goddess in Wicca etc. Even other works of fiction like the Chronicles of Prydain (one of Jim's favourites) Orddu, Orwen and Orgoch. It's fascinating to dig into but I have found it doesn't give all that much more clarity, instead just spins off more possibilities. The obvious thing is that being creatures of magic and reliant on belief, the Queens of Faerie are all of these things. This is a big part of their power. That's what the mantle is. Jim hints at this when he talks about the mantle of "Strongest" going from Hercules to the Hulk.
Your comment about the guards makes me wonder if Eb actually provides the magic to do the black magic, or whether the blackstaff itself forces Mother Winter to do it. If so, she would be pretty pissed I imagine. And as for being in disguise - that makes some sense. Although Rashid's eye is secret because he is engaged in a secret war for Reality against sleeper agents (among other things). It might not be necessary to hide the Blackstaff in the same way.
Also, what did you mean when you said they "got all murderous and got themselves a Titan"? What event are you referring to?
I must admit I had considered the possibility that this so-called "Last Titan" (so-called because I wouldn't put it past Jim to have another show up) might be actually a
third Court/Fate trio. This being seems to be an order of magnitude above Mab, according to the blurb. This puts it around the same level as the Mothers. Perhaps it has it's own Queen and Lady under it.
