Goals handy tool, but its presence does not negate the need for sub-projects.
Using the scheme: 'The goal - projects' for a large project is less convenient than the scheme 'Project - subproject - subproject'

How Come?

1. Overview - view attachments from multiple projects from multiple levels of convenient and intuitive. This approach is used by all programs for project manedzher. A good example of this planning services Todoist: use drag and Drup can quickly make tasks of the subproject and padding will demonstrate nesting and maintenance projects

Screenshot with example: http://i.imgur.com/gSqYCjx.png

Looking uncomfortable work projects move from the project in Goal, only by the fact that some projects more structure than others

2. The semantics of goals
Goals convenient structure for example:
'The Goal of the week' - important projects and tasks for this week
The Goal of the Month '- important projects and tasks this month

Huh !!! why not include projects and tasks to multiple Goals? Task or project may be the solution for several Goals

3. Requests for users who lacks this functionality


http://help.doit.im/topics/3985
http://help.doit.im/topics/284
http://help.doit.im/topics/4254
http://help.doit.im/topics/4942
http://help.doit.im/topics/3669