These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Creator Breakdown: Franquin in the middle of QRN sur Bretzelburg. His "last" album, Panade à Champignac, can either be seen as an affective goodbye to the series... or as a big "Fuck you, I'm going to work on Gaston Lagaffe instead".
Daddy's Little Villain: Luna, Vito Cortizone's daughter. She disapproves of some of her father's methods but still ends up on his side in the end.
Morvan & Munuera tried to integrate elements from all their predecessors into their run (including Rob-Vel and Fournier), but unfortunately for them many fans wrote off the series after the departure of Tome & Janry.
Taken out of context: Fantasio wakes up, apparently in the same bed as Spirou. He's covered in a whitish dripping liquid. He shouts "The condom! We forgot the condom!" (capote means both hood and condom)
The context: Fantasio and Spirou are sleeping in a castle ruin, two separate beds. They used pieces of tarpaulin to keep themselves from the rain, except the one above Fantasio suddenly ripped and unloaded buckets of water on him. He wakes up shouting "The hood! We forgot the hood!" (on the car, to protect it from rain)
It should be noted that the example given is from the series "Spirou de...", which is basically a series of adventures unrelated to the canon universe... So this isn't exactly the best example to show how the  is still alive and kicking...
Zorglub, even before his Heel-Face Turn. Also the whole point of Le Réveil du Z, where Zorglub's successor only manages to recreate The Theme Park Version of the original's vision.
Let's not forget Vito "La Déveine" Cortizone, a powerful mafia don who eventually is somehow deported through the little rural town of Champignac with nearly no security.
The Triangle went from "globe-spanning barely competent criminal organisation" in Du Glucose for Noémie to "half a dozen idiots who can't even operate their secret lair's traps correctly" in L'Abbaye Truquée, mainly because they lost most of their competent members in previously failed operations told between Glucose and Abbaye.