The worst part of the gameplay trailer for me was when the Nosferatu goes 'no no no no no no no, all I had to do was keep my head down for a few nights' and your backseat driver handily pipes up with 'he's hiding something'. It feels like Fabian is in it because the devs can't bear the thought of not handholding the player for even a fraction of a second lest they miss something the devs have decided is important, which shows a lack of faith in either the intelligence of the player or how well the game communicates its plot points and themes.
An explanation that makes sense to me is that Paradox demanded a Johnny Silverhand so Pinchbeck decided to make him as obnoxious as possible in the hopes that they would change their minds (they didn't).
Alternately it's Le Bray's idea. I believe it's within the realm of possibility that a Bioware QA tester who wasn't actually good enough to get promoted to a writer within the studio would think he's a fantastic character.
The intent as described by
Longthorne
On Fabien, one of the dilemmas we encountered was how to make someone like Phyre relatable as a vehicle for the player, given how cold and detached most elders are (okay, except maybe Jack). Fabien basically acts as a counterweight because he is more connected to his humanity.
That seems sensible, but he doesn't have to be a total idiot who talks all the time.
I guess that concept can actually work (Ninja Ninja in Afro Samurai), but the execution here is just awful.
... you know what if they had
guts they'd replace Fabien with a black guy. "He's hiding something"? Lame. "Hellllll nahhh, that nigga's HIDIN somethin'!" Hilarious.