What kind of leader do you believe Paul is indicating for us with the phrase "husband of one wife"?
As I read these verses I believe Paul is saying exactly what he means and that includes the word husband as a qualification. I think what happens too often today is that because we maybe don't understand the reasons why the Bible says certain things and it maybe doesn't fit with our culture, then we try to make the bible fit our culture instead of trying to get our culture to reflect the bible. I realize that there are things in the bible that were said that were only applicable to the culture of the day but I really feel that this isn't one of them. The bible is very consistent on this point.
Why is a leader's family an important indicator of leadership potential or problems?
Good leaders are able to lead wherever they are whether in public or private. The family is definitely a reflection of someones leadership abilities. Sure kids are going to stray and mess up but it how the father responds to the mess ups that decides whether he is a good leader. It directly applies to the family of God. Even under a great leader there are members who are going to stray but it is how the leader responds to the members that will decide how great of a leader he is.