Is that where they conceived their child, and if so, will being conceived while it's parents blood is contaminated with WCV toxins have any effect on the child as it grows older?

Georgia was pretty late-term in Aftermath, wasn't she? I think Changes followed Turn Coat pretty closely (like summer to fall closely) so she was probably already pregnant at that point, just early enough to maybe not have known so yet.

1it doesn't have to be rooted in angelic power, but isn't it? Drakul in the DF I think is literally Lucifer trapped in a mortal vessel without his power

Nice explanation for Michael's description of Mavra, but I'm afraid it doesn't hold together. We know Lucifer is not deprived of his power, because he sponsored the Hellfire pentagram traps in Small Favor - Uriel confirmed Harry's deduction that energy expenditure on that level had to indicate an archangel 'cheated' to involve himself, by saying that was what gave him room to balance the scales by granting Harry soulfire.

This is simply incorrect in the Dresden Files.  Drakul and Dracula are two completely different people. Drakul doesnt have any connection to vampires at all (that we know of), rather his son Dracula specifically and intentionally Created the Black Court in the course of vague family Drama and daddy issues.

I think the relevant WOJ leaned pretty strongly in the direction that Vlad Dracula didn't intend on exactly the result he got by founding the Black Court. It wasn't explicit, but I got the sense he'd halfway flubbed an ascension ritual and turned himself into a monster rather than a minor god.

There's bound to be one for Dead Beat as well, but I can't think of it.

The Maltese Falcon.

The council expert on the vampire courts was killed, but I. Wonder what happened to his gathered lord. I could see mavra and cowl eager for the parts concerning the BCV, that combined with necromancy would have epic consequences.

I'm pretty sure "Cowl" doesn't need Simon's notebooks...

Some of them have a recurring pattern, jim has acknowledged vaguely. Like the Denarians every five books, for example. 
I expect most if not all of those to appear in the next one for the Peace Talks (probably not Cowl, at least not as an envoy).

Skin Game threw me for a bit of a loop with that. I'd kept expecting at least a B-plot with vampires, since one court or another has been significant somehow in every multiple of three up until SG.

Michael attacks Langtry either to save Molly from execution or in vengeance after an execution, which was called for by a majority vote from the council:  Michael fails; the sword breaks, and Langtry incapacitates him without killing him.  Quickly and efficiently.  He didn’t become the Merlin by collecting frequent flier miles, after all.

Using the sword irresponsibly doesn't automatically break it. Rather, it just becomes vulnerable to being broken. So if Michael tried to use it for personal reasons, Langtry could just lock him down in a cocoon of hardened air until he dropped it (that binding Harry and Elaine figured out may have sucked against other wizards who can attack the 'knot', but it's more than adequate against anyone non-magical).

It would still prompt questions of, if they knew Justin had stolen the skull, why it didn't turn up in the wreckage after Harry defeated him.