Option to Group Project Tasks Assigned to Multiple People (aka new task feature)

For the most recent update, the option to create separate tasks for multiple owners was added, which I think is awesome!

The only thing I don't like is utilizing the feature for project tasks can expand the project plan--a lot in some cases.

It would be great if there was some sort of grouping option where the tasks would still be assigned separately to each owner, but the project plan would only display the one task...maybe there is a drop-down to see the individual assignments...maybe this one task acts as a parent metric so the hours roll up...