Sleeping in the open?

[Homebody]

This is new as in he's only very rarely done this until this week.

I'd hold off on making any changes. Your bp is apparently healthy. There is nothing alarming about this new behavior. Snakes do weird things sometimes. Just as he stopped hiding this week, he could just as easily resume hiding next week. I'd monitor the behavior for two or three more weeks. If it continues, then, consider making changes.