Dear Angelo,
I am not sure I understand your question about ODK 2.0 permitting you to create directly your app… If it’s helpful you can look at the slides I posted here:
Which explain the different tools and how they relate. You do still have the whole workflow of designing, converting, putting in Aggregate, etc.
You can send surveys across users, that’s row access filters in here:
http://opendatakit-dev.cs.washington.edu/2_0_tools/release/218/data_permission_filters
I don’t know any way to load dynamically itemset values, or create pdfs, maybe others have ideas.
Hope that helps!
Best,
Caroline