Priority at a project level



I have been using Asana to manage projects for my team for a few months now (and we’re still getting up to speed). One important item that I feel is really lacking is the ability to manage priority at a project level for my overall team. I know I can use the custom field to set priority at a task level but this does not help me manage my portfolio. I’ve seen others on here requesting similar functionality. Why hasn’t it become a feature?