Probably no more for a while. I don't think we've really seen the full implications of Soulfire and being Warden of Demonreach worked out, and Harry doesn't really understand the Starborn thing yet (though he seems to be able to use it instinctively in CD regardless) ... but I can see one more before the BAT.
Possibly something associated with Odin -- he has Soulfire from Uriel, the Winter Knight Mantle from Mab, he used to have Hellfire from Lasciel but rejected it... you could even count Lea giving Harry his mother's "Gem of Knowledge" ... most of the beings of cosmic significance who have taken an interest in Harry have given him some kind of power. But not Odin...
Well, Dresden did call Mother Winter Skuld, one of the Norns, which fits the triple goddess triad theme they've got going on. That'd make Mab Veroandi, and Molly Uror. The funny part is that Skuld is the youngest Norn, but represents the future in the Edda, so that could fit one of the interpretations; personally, I think that Harry had them backwards. Anyway, the Norns are Jotuns, not Aesir, so I'm not sure Odin
can give Harry an Aesir powerup. Does that make sense to anyone else?
Regardless, you have a good point. I feel like Odin will try to give Harry something, but I don't think it'll be a mantle or anything that represents a straight powerup as we've come to think of them. Aside from Harry having power that's loosely connected to Jotunheim, I don't think Odin has the leftover power to split. Maybe he can let him borrow Gungir (though I'd personally be pumped if he worked out a deal to hook up the Alphas with Fenris in some capacity).
I'd most like Harry to get a straight, Winter Knight-style power up from Hades. They share a connection, and Hades has a certain amount of respect for him, so I feel like they should solidify their bromance with an exchange of power.