Thank you for the feedback!
As an update, we’d like to pursue improvements to the checklist functionality in Planner, but don’t have any near-term plans.
If you’d like to vote on task dependencies/linking/referencing, please head over here: https://planner.uservoice.com/forums/330525/suggestions/13976094
We will keep you updated when there are any changes. Keep the votes coming and comments coming!
The Planner Team
An error occurred while saving the commentH Brown commented
I see this is very old request, please consider to add subtasks which can be assigned to individuals.