As a long-time user of the site, I know the current "Needs more focus" closure reason used to be called "Too broad" and have been applying it that way. However, it occurred to me when reading and comparing the descriptions for the "Needs details or clarity" and "Needs more focus" closure reasons that these may be confusing to the unfamiliar.
Is "this thing needs more focus" not the same or very similar as "your question is obscured by other text and needs to be clarified"? Can you not add details to provide focus? The main difference seems to be "no obvious question" versus "too many questions."
I'm sure there was a post on Meta a while back explaining why this change took place, but I'm too lazy to go find it. It just feels like the new text makes closure more confusing than it used to be.