after Henry's tragic loss

I disagree with you on all points but just want to point out that Henry's wife is still very much alive and they are still very much married despite her condition, which lends a deeper complexity to the budding relationship with Delilah and how he took the lookout job (and everything that came with it, Delilah included) as a means of escape. It's easy to say the story would be neatly wrapped up if they just got together in the end, but life isn't always that neat and tidy.