Since now Backlog folders start to become Projects, it would be great to set up Weekly objectives within them.

And then be able to EASILY connect future tasks to those objectives.

When weekly planning happens, those timed objectives show up to add them along with tasks connected with them.

Then the hard part remains of how I break my objective tasks within my week.

Since you've planned to have Kanban Board to backlog, I think also adding the ability to easily move objectives between weeks or expanding when things take more time would help. I always have on my mind of how this happens with a Gantt chart but that doesn't mean it can't happen with Kanban. Just a thought!