[SpiralOcean]

I agree that you want to know how many items are due, that's what the badges are for. Often, I'll see contexts that will have badges of due items but will not see all the due items in the context.

Example:
context shows 3 items due
action in context is only one

The meets the first criteria that a user should have an alert that items are due.

However, when I have a project whose actions are split over multiple contexts, and the project's actions must be in a certain order, it only muddies the water to show all those action items in the different contexts.

This causes me to loose trust in the system. Because now, when I look at an action in a context, I think:
wait, I can't do that now, I haven't done the first action of that project.

I no longer trust what OmniFocus is showing me. The other requirement for GTD is that you only see actions that you can do something about. This is the purpose of the contexts.