disclaimer: I have not read Musketeer Space (yet) and so I have no idea whether I'm missing anything here.
I kind of like the conceit, which is that across the course of the seven days of the Joyeux festival, a sequence of mostly harmless events are happening that reflect the days of a different festival. This allows for a lot of really interesting world-building, and the odd reference to theological philosophy.
As a sequence of inter-related set pieces, this works really well. As an integrated story, with any amount of consideration to the political and policing subtleties of a sequence of events that start by being described as 'festive terrorism'? Let alone addressing the religious fundamentalism that drives parts of the plot? It completely failed for me. It was too light-hearted about a sequence of potentially disastrous events, and the further I got through, the less I felt that the story was addressing the 'who' or even the 'why' of what was going on. Plus, a completely bizarre set of romantic pairings that kept me wondering about what the author's conception of these characters was, because I certainly couldn't get a handle on them at all.
Oh, and the solution was too pat, too telegraphed.