Strengths
* Fairly low powered god. The combination of Lady, Queen and Mother is collectively equal to a strong god like Hades in power. The Mother has the lion's share of that power, so Mab by herself has to be fairly weak in the god power scale. I would argue that the very weakness of her god power is a strength as she suffers much less restrictions on the use of her power as compared to the more powerful gods. The universe as described clearly has rules that severely limit the more powerful beings. The Mother must be far more constrained than the Queen and the Lady should be less constrained than the Queen.
* She can hear things spoken at night, especially if her name is spoken. Great source of intelligence
* She commands the winter fey. Mother may be stronger, but the queen rules day to day operations
Weaknesses
* Mab cannot harm a mortal directly, but must wait for them to make themselves vulnerable (via a deal) or use the Winter Knight.
* There are MANY other powers comparable to Mab out there in the universe. Her attention must be split to counter many of them and/or make sure their agenda does not hurt Mab's agenda. For example, the entity behind the "worshipers" in the molly short story has nothing to do with the Outsiders, but was still a threat to Winter's interests. Even though the Outsiders are clearly making a move, Mab cannot afford to ignore the other threats just in case they are acting while Mab is distracted.
Lots of theories in there - I am curious about where you get your ideas from though. So let's unpack.
Mab is a low powered god - where do you have reference to this? She is clearly stronger than retired gods like Odin and the Lords of the Outer Night. In terms of your scale and the god you have compared her to (Hades), are you saying he is as strong as the Mothers (and by extension, an Archangel)? Because I have yet to hear of any evidence to support that. Archangels, and beings of their level (the Mothers, the Walkers etc) are beyond mere gods like Hades. But I am open to a discussion of an alternate point of view.
I don't believe that her power works like Anduriel's, in that she can hear all things of the night. Her title as Queen of Air and Darkness, is more to do with the human elements (reason and savagery) than the physical phenomena. Which isn't to say she has no influence (she rescued Harry from the cold dark waters of Lake Michigan) but I think this ability has never even been hinted at in the series. Her ability to hear her name is more to do with being supernatural, even Toot-toot has that.
Mother Winter serves more like the Chair of the Board, the ultimate ruler. She doesn't do day-to-day operations as she has duties and concerns that are much higher and more complex. She is more akin to a force of nature, than merely a steward of a role. As Jim says, you just obey gravity - duh.
Mab may not directly be able to harm a mortal - but she doesn't need to. She has all those other Winter Fae for that. Plus a Knight.
And the worshippers were worshipping a "sleeper" something that the Outsiders wanted released...
SK - We don't know that humans CANNOT be infected either. We only know of a few infected being anyway.
forumghost - I thought similarly for a while, that Maggie is behind a lot of this and was on the original team of rulebreakers. But. I also wondered if she merely, in her activism, came across more extreme types.