Unallocated Tasks effect on resource management for agile teams

[#1]

For agile teams it is difficult to show future capacity/workload and predict when we will need extra resource. Instead of a list for the unallocated resource, it would be useful to show if there is capacity within the team to get these task completed. So if everyone in the team was allocated work to be at max capacity, is there enough resource to cover what needs to be achieved.