As far as "fancy arrangements" are concerned:   It's nice to be able to do them—and then chose not to.

A little while ago I was listening to several YouTube renditions of the ballad "Geordie." Every dad-burned one of them was overwhelmed by the accompanying guitar. Fancy finger-picking or excessive guitar intervals between verses. It's a story, fer cryin' out loud, and the story can get lost if one is repeatedly distracted by the accompaniment.

A good accompaniment is like a good picture frame. It should merely set the painting off in space. If it distracts from the painting and people go away saying, "Gee, isn't that a great frame?" then, no, it's not a great frame. It has failed its purpose. Same with song accompaniments.

Don Firth