The predictive roadmap aggregates estimates across all issues in your hierarchy, so you can add estimates at any or all task levels. People often add rough estimates to an epic during early roadmap planning, and later add estimates to individual stories, tasks or subtasks prior to starting work.
The predictive roadmap prioritizes work based on the rank you set for epics or initiaitves in the Jira planning view, so they will be scheduled in the same order.
The predictive roadmap supports grouping by epics, initiatives, or releases so you can see the schedule based on how you currently do your planning.
The predictive roadmap supports both time and story point estimates, and will translate between them in the same view if you have a mix of both estimates.
The predictive roadmap can apply the velocity either to a single workstream for the whole team, or individually to workstreams for each assignee, which helps uncover bottlenecks if specific team members are overloaded.