Oh, I heartily endorse his suggestions! I just want to make sure that we make maximum use of students (and their code doesn't get tossed at the end of the summer, which has serious morale consequences ;)
This is my concern as well.
One of my past students pitched a core project and ended up spending most of his SoC time in the PEP process (http://www.python.org/dev/peps/pep-0368/). Given how frustrating the experience was for him, I'd rather have future SoC students be able to focus on code.
Let's at least have rough consensus on brainstormed ideas before they hit the ideas page. Existing PEPs that have had a time to air and evolve are much better for this reason.