And souls can be restored too. Harry doesn't have a finite amount of Soulfire for the rest of his life; he just has to make sure not to use too much, too quickly, and not give himself an opportunity to enjoy himself.
Though, as Winter Knight, he'll probably have very few opportunities to enjoy himself anyway, and Molly as Winter Lady will have even fewer...

Well it's not like intimacy with another person is the only way to regrow the soul. Making art would probably do.

But I'm not sure there is a recharge option for somebody who's carrying one of the Queen mantles at all.

It appears to be true...  Do a search on Bing for "Dresden Files fox" and it's being reported all over now....

On ... Bing?

One of the Walkers - I think it was Behind, in the flashback from Ghost Story - taunted Harry that the mortal domain was once theirs, and would be again. I don't think he was lying, either. He didn't seem to stand to gain anything from convincing Harry of that, for one thing.

More significantly, the Outsiders have been described a few times as servants of the Old Ones, the Lovecraftian powers that are still within reality but have been suppressed into one extent or another of dormancy. My interpretation is that they're more or less analogous to the more familiar powers, but exiled knights and foot soldiers have been cut off from the progenitors of their pantheon. The troops were kicked outside the Walled borders, while the Old Ones were left inside but dormant. Their war on the Gates is about trying to get back in and rejoin / awaken their masters.

Based on Uriel's statement in SG that he'd been fighting wars, plural, before the Earth took form, and the Fallen's rebellion would only account for one war even if it did predate creation, I take it that TWG and his pantheon needed to get the primal forces of chaos out of the way to stake out the turf for creation. Possibly with the assistance of some of the older freelance supernatural entities that were around then and ended up with mortal religious followings of their own.

We're limited in what we know about the Gatekeeper.  But JB has teased that he might have thrown down with Demonreach and by inference the last warden.  Drag, thump.

The spirit's limp is from the glaciers hitting the island in the last ice age. It has some sort of strained history with Rashid, but Harry was wrong about connecting it to the limp.

The distinction is a little iffy -- from what I understand, a sorcerer is like a wizard without the formal training. A wizard means you're in some way recognized as one by the White Council -- there's mentions of trials and such; I think Jim's said that one basic guideline is they're able to do everything between evocation and thaumaturgy. They might have a specialization and/or suck at one or two, but they have the capability of doing it all.

Didn't GP say something about sorcerers are more limited in their range of abilities, and almost all skew towards destructive?

no, it was necessary the vault in question actually BE a secured one and not blown wide open lest it change the integrity of the way... had nothing to do with harry believing it was a heigst or not.

Even if you read it that way - and I'm not convinced one should, given Harry's narration that two practitioners might hit different parts of the NN opening a gate from the same earth location - it still means the site isn't going to connect to Lea's garden any more after burning down and then having a castle built over it by new ownership. The connection only existed in the first part thanks to fairly significant work on Lea's part. Once she was no longer required to put in the work to keep up with changes by her bargain to protect Harry, the connection would be lost.

Baba Yaga seems to be a separate entity. Jim once used her as an example of mantle gaining (I think it was something like, if Mab offed Baba Yaga, she would have to become her, and the Winter Lady would get a promotion). The RPG also mentions her as a separate character, an incredibly powerful and mysterious maybe-fae who Simon Pietrovich is pretty terrified by.

I mean, having to move up a step and be replaced as Queen by the Lady is exactly what would happen if Mab did pull off a coup on Mother Winter...

I'd call it inconclusive from the given info. Kringle and Vadderung are "technically" separate characters too, and I'd almost be surprised if both the Mothers don't have a range of different hats they can put on.