Something that I would be useful would be the ability to assign project/folder dependencies. Example:
Project: SQL Server Update
Folder: Reporting Rework (Depends upon completion of entire SQL Server Update project)
Task: Create XYZ report (Depends upon completion of SQL Server Update as a whole)
I hope that makes sense, basically just taking Dependencies and expanding them so they can be on projects/folder and also so that an assigned dependency can point to a Project/Folder.