I would prefer grouping by item type in focus list. Like it’s grouped in the search results list.
So all next actions are together, as well as waiting fors and projects.
At the moment it’s not easy to distinguish those different types and it’s just a big lump of yellow stars, mixed up up with some red overdue dates.
In general more group and sort options should be available on all lists. In a GTD list manager I’d expect those kind of features, So I’m able to slice and dice my information as needed.