I'm still missing the more down to earth companions like Eder, Ajantis, Branwen, Kivan, Keldorn, Jaheira, Valygar, Jan or many others from BG1 and 2.
Good writing is much more important than creative or fantastical characters. If you have too many "special" characters it just becomes a weird menagerie where they compete who's the most creative and undermine the story.
Larian does take the stance that the origin characters are all main characters in their own right. That being said I would appreciate some down-to-earth party members as well.
You can't have 4 main characters together at the same time. It's like a textbook example of a paradox. Maybe that's the mistake here then.
That said, the cast could work IF we got at least two down to earth ordinary hero or anti-hero characters for companions. With great stories and personalities of course, just nothing as extravagant and incredible as we've already seen. Something more relatable
Gale's story didn't have to be so far out either. His condition could have been caused by anything magic related and it didn't have to involve gods and planes.