I actually dig the finale we got.
I remember at the time being kinda dissapointed with it but I was like 12 so what the fukk did I know.
Watching it now I really enjoy it. And this may sound like a reach to some but bare with me cause I was really high when I thought of it... but part of me thinks that they all DID die on that plane and that whole trial was them being sentenced to purgatory. It didn't feel like they were on trial for a crime. It felt like they were on trial for their souls. Especially the way all the people from their past came back to shed light on their sins.
I guess it all depends on how you choose to interpret it but honestly I wouldn't be surprised if it was discussed.