Journal defined:
A personal record of occurrences, experiences, and reflections kept on a regular basis; a diary. Maybe you have seen Captain Kirk in StarTrek making entries into the "Captain's Log". My entries are not necessarily tasks. I am using MLO to record something that I observe, or record what I am thinking. I need the exact date and time of the entry. There is no "threshold" for creating an entry. For example, it does not have to describe an action that is performed by someone.
Create a view that shows all tasks, group by Created Date, sort order descending. Group only by days is checked. Do not show hierarchy, show as a flat list.
That is the journal. Nothing else is required, although some of the entries may go on the have a due date assigned to them, contexts added, etc.