it is by the 2013 bible does the design we know as "Felix" start to transition into "Adrien" (even though he has been Adrien since the beginning.) the plot that he desired to become a doctor was officially dropped at this point for a new, less complicated goal...
There is particular emphasis on how he insists on wearing casual clothes.
He is far more rebellious, and actively tries to skirt his father's goals for him. Piano and Art had carried over from previous bibles, but was allocated to "things his father wants from him"
Adrien still has a bit of a bitter personality. He is still very Felix.
Him and Marinette are explicitly lined as friends. This is wildly different from the later bibles, which change this line to...
(this is the 2014 pitch that went forward into the series)
Adrien's "miraculous" is actually his cane. not his ring.
Adrien was also meant to have a better relationship with Fu, and seemed to even admire him.
Gabriel was far more interested in Adrien's wellbeing than he seems to be in the current show
he was intended to have a friendly connection with Alix.
So you're telling me and the whole fricking Paris population... that were getting fashion advice... from a punk that wore THAT and did his hair like... THAT... why is he RICH?!?!