First of all, congratulations on the style and presentation. The layout and typography are quite similar to classic traveller books and look good.
I did not have any trouble reading or understanding the adventure. Regarding what to cut, there are little bits of information, like the retail outlets of Parfum Dumont, but they are never paragraphs-long and I personally like these small bits and tangents that end up adding to the atmosphere of the setting.
There is one bit of information that was cut short: on the second bullet point of "Investigating the Claims" on page 5, the phrase "Obtaining a location or contact details for Jeanne Marsh is not too complicated: they are" is not concluded. Also, I was not sure if Turleigh was part of the R&D department and, if so, did anyone else there know or were affected by the same problem? Lastly, I expected to have some information on the security of Atelier Parfum Dumont and its surroundings, as players might decide to infiltrate it in their investigation.
I liked the presentation of the relevant NPCs and places, rather than a collection of scenes that might end up railroading the players. This might lead players to go off on tangents away from this one-shot, though. Maybe there could be another incentive to get the players involved.