I think this has been asked several times but still isn't in the new Forum, so I'm here to ask it.
When using projects, it should appear only one task by project in 'Next', that's essential for GTD. If all the tasks of a project appear there, you lose the focus and have to do workarounds.
So, I hope you can implement this key feature.
Some interesting ideas about this have been discussed here: http://support.doit.im/entries/311191-Multi-Level-Nested-Tasks
Appear only one task by project in "Next" and then auto show the next one by project?
We have it listed in our development plan but it takes time to realize. Please be patient.
Shall you need any help or have additional questions, please feel free to contact us.
Thank you for your feedback and support.