Re: do you get disturbed that this isn't entirely biblical?
Mostly it doesn't bother me. Most of the changes are probably just for time restraints, after all. It captures the basic story (i.e. what most of us remember learning as kids in Sunday school) perfectly well. Nor do I mind the fact that it doesn't mention God much. The musical isn't so much about religion as it is about telling a good story, that happens to be from the Bible, in a fun way.
This is one change that I do sometimes feel a little iffy about. So many productions of the musical make it ambiguous whether Joseph gives in or not, which is totally against the Bible and takes away from his integrity. Fortunately, I've seen the show enough times that I know it can
be staged in ways that keep his innocence clear while still being hilarious.
Not to be a pain, but this summary is kind of mixed up. The brothers initially come to Egypt without
Benjamin, and Joseph makes them go back and get him as "proof" that they're not spies, keeping Simeon
behind in Egypt in the meantime. And their father is Jacob, not Isaac.
One other element of the Bible story that I kind of wish were in the musical is the fact that Benjamin is Joseph's only full brother and therefore Jacob's second favorite. It just makes it clearer why Joseph uses him to test the other brothers and why their defending him is so meaningful. I also kind of miss the Bible Joseph's tendency to cry: he weeps about six times in the Bible. Yes, that's a little much by modern Western standards, but I find it endearing. I'm a sucker for male sensitivity.