Dontnod explained that the "Sacrifice Arcadia Bay" ending felt half baked because of budget and time constraints.
Personally I chose the SAB ending first and I was puzzled by how Max and Chloe just drive off, seemingly not giving a fuck at how her family and friends were just killed lol.
I replayed and chose the SC ending and it felt better. I kinda wish I'd chosen that at first though as I wouldn't have felt the emotion, something which I didn't feel as I was still puzzled by the other ending.
I know I'm fighting a redundant fight, considering everything I can say can be dismissed with the developers final say. But given that the
Sacrifice Arcadia Bay ending was my first choice and the first ending I saw, I was quite satisfied. I found a lot of content to read into in that scene -- In regards to the reason they didn't investigate friends and family or notably seem concerned, I feel that them driving away in a seemingly nonchalant fashion was very representative of their (Max & Chloe's) dismissal of everything that wasn't them, anything not Max and Chloe no longer matters to either of them, Max actively picked Chloe over the Bay and there's no looking back, Chloe appreciates Max's sacrifice and is very intent on moving on with her. Although on the other hand, the closeups of Max in the car, there's visible concern, My Max cares about generally everyone in the town, my Max also cares for Chloe above everything else though, but there's a guilt, a weight on her, Chloe is a living reminder of that, while also being everything she cares about in the world, Max's scene in the Diner in the nightmare is representative of how she might feel here. Max and Chloe's relationship is now potentially very complicated because of it. I read the scene as quite ambiguous, whether it was the right decision or not is impossible to say, and neither of them have to answer that question, they're just moving on, together.
Whether or not Dontnod say the ending isn't
meant to be ambiguous, or was
supposed to be more elaborate doesn't change what the ending is and what I saw, at least not to me, it was incredibly effective and powerful, and builds off the strength of these two characters, and the inhabitants of the Bay at large -- and having an ending rely on the strength and culmination of the characters -- rather than the strength and culmination of the plot, isn't a bad thing at all.