I think P2 is important, but it is only a part of the build story. Yes provisioning is important, but only a piece and a step in the overall build story. Can you build and use plugins with out P2, sure.
It may be part of the build story, but it is the underlying foundation. It's the way people acquire and share Eclipse-based artifacts moving forward.
Our annual release builds a large p2 repository. We have a provisioning technology finally that allows us to produce artifacts and stuff them into a repository and query them.
Like I said before, under the covers, Buckminster, Athena, Tycho use p2 to build things like repositories.
If we can find the time, and somebody wants to drop another Tutorial to make way for it then by all means. But I think technologies like Buckminster, Buildr for OSGI, Athena, and Maven/Tycho are just as important to the community as a whole, and cover a much wider story in Build and Continuous Integration.
I would favor even 50 minutes 1 hour hands one sessions like Athena had proposed, so that people can come and ask questions.
Find the time and we give equal weight to Buckminster, Athena, Tycho, and P2/PDE then we can go from there.
As for documentation, for P2 that is a whole nother issue all together, and honestly, should be done anyways not just for a conference.
This is an advantage of a conference as for some developers, this is the time they can get paid to do documentation exclusively and make it available for everyone.
I like the way the B&CI track is structured now giving equal time to most of the technologies but we would be doing a disservice to our users and adopters if there wasn't solid p2 hands on content in the program. I spend a good part of my work life helping people with p2 issues and adoption. The more content we have the better.