Absolutely brilliant. You're definitely knocking previous arrangements out of the park. The opening might be one of the most difficult pieces to do, because it incorporates the Raiders March so prominently. I've heard that a four digit number of times in its fully orchestrated variant(s), and yours still sounds great.
I've listened myself unconscious with the existing stuff on youtube over the years, especially the 3:16:20 version that somebody uploaded in 2014. I'm still obsessed with the idea they'd reboot FOA and use an orchestra for the soundtrack. And I still think that overall, it's the best that Clint, Michael and Peter have ever done. Yes, better than Monkey Island even.
Not looking that forward to the end credits actually, as that would be more Raiders March. 😅 An actual track that draws on Fate of Atlantic specific themes and introduces the motifs would be "Sophia's presentation". And of course, there's all the themes while exploring Atlantis that really stuck with me and elevate the soundtrack above a mere hommage to John Williams' undoubted genius.
I'm looking forward to hearing how you're progressing.