Re: Kings
I don't think at all that David needs more confidence, as we don't know from the biblical telling that David didn't have insecurity issues, etc. We know what happened, but we don't know what went on inside of David.
Yes, the series is a modern-day retelling of David and Saul, but it's not supposed to mirror everything exactly, and therefore, it doesn't matter that for the purpose of THIS story, David told his brother he was surrendering. There are lots of details in this story that don't mirror the original and they're not supposed to. But they definitely got the spirit of the original down pat.
I thought the pilot was great!