First of all I appreciate that the module can "accordion" between one or more sessions. I don't see that enough.
The vibes of cool, hot spy fiction here is great. FIST design often skews slightly grittier or otherwise less glamorous and giving the agents a moment to breathe undercover like Agent 47 is a really cool change--with specific beats designed to meet and then have to rescue or tangle with those guests. A timeline for the adventure that is essentially a set of rails designed to be jumped off of is my favorite way to design an adventure module. Really well done, tons of personality, I had a great time reading it.
I think something I'd like to see in future versions would be more art assets like the dope work on the front and maybe some maps of the hotel to help encounters emerge more naturally depending on where FIST is trying to get to--traversing the Hotel could end up feeling like planning a route in an older Resident Evil game or something!