One of the things that really bothered me in the PT book was Harry and Eb both talking about how Etri was going to be super pissed at Harry if/when he found out that Harry took Thomas.
This bothers me a lot. We've been hearing and hearing about how responsibility for an action carried out by an entity's agent is basically deflected upwards in the supernatural community. That is, if you're acting as someone's agent, responsibility for the outcome of your actions belong to whomever you're working for. Harry was Lara's agent in the kidnapping of Thomas, and so she bears responsibility for it, not Harry.
Etri is, as we know, super old school, and is so in line with this proposition that he lets Listen and the other turtlenecks go after the events of Bombshells. The rest of the svartalves seem to be as well.
If everything works like it's supposed to, Harry should be in no danger of reprisals from Etri or any other member of Svartalfheim for taking Thomas. And so this entire point of story is just completely out of place.
The scene with the Svartalves trying to enter Molly's apartment from below to get Maggie also seems entirely out of character for them as well. Given that they granted the apartment to Molly and all the provisions of the transfer being as they are, attempting to force such an entry seems...less than honorable.