

At the risk of incurring the wrath of people who are hate watching the show, I will say that the episode was fine. It is meeting my expectations in most ways.
The explanation that Malice was draining high level criminals was good that it confirmed certain suspicions that she is indeed power leveling and that doing so does result in a lack of practical experience.
Luce refusing to allow Elm or his father Isaac to negotiate her out of the room is a pretty funny running gag at this point. Also funny is that Elm sets a condition that should he win, Isaac has no more right to interfere with Elm’s life- clearly Elm has not thought this through.
Isaac already thinks it is impossible for Elm to win, but if Elm wins, Isaac would be forced to reconsider his decision to make Malice his heir, but Elm’s condition makes that decision irreversible. Elm really could have asked for the moon and just asked instead that Isaac pound sand instead.
I consider Isaac being a dumbass realistic given that the likelihood he has received significant pushback from anyone is close to zero. There is plenty of lore indicating the aristocracy through greed and stupidity has warped the economy of this world.
The butler did his homework (in other words, the investigation) and reported his findings, but Isaac was having none of that, decided that Elm had cheated his way up the ranks, and the only thing left to do was to unmask the collaborator who knew of Elm’s aristocratic roots.
The plan had been to expose Elm’s failure to uphold his promise and then to execute him.
I suppose that there is a kind of irony that Isaac had unintentionally invalidated the spirit of Elm’s promise because he had barged into the guild with the expectation he would be killing Elm and leaving.