Use Project Instead??
It appears that a good number of the ideas can be implemented by using MS Project? I could be wrong but the rationale behind creating this tool was the fact that some team collaboration work is too small in scope to necessitate using Project but some work maybe to large in scope to use a 'cobbled' work flow methodology (i.e. email, Lync, file processing, etc). If most of these ideas came to fruition, you'd have a full blown PM tool- Project.
Rick Bojahra commented
I agree with the comment on integration between planner and project. We have engineering teams that are using planner to break down tasks and collaborate but we use Project to resource plan the entire company. So one task in Project may be 10 or 20 small steps in planner that involve 5-6 people for a day. To much overhead to track these in Project and planner allows remote teams to collaborate. Especially when you launch the Planner app from inside MS Teams.
Gareth James commented
To that point. I would love to see integration between planner and project. For small stuff I run myself, planner is awesome. But it does not scale to large projects where Project would be used. If a item could be crated and tracked in project, which automatically creates a task in planner, that would be fantastic. When the task is marked completed in planner that should roll backup to Project.