I'm really glad to see this discussion continuing. It seems like
there's a good amount of support for at least giving a certain amount
of sessions over for the program committee to decide.

At 15%, we'd be looking at 3-4 slots reserved for the program
committee (whoever that might be next year) to do with as they wish.
If there's no opposition, I'd still like to propose giving the
committee the flexibility to use those slots to "diversify" the
program, one major consideration being first time presenters, but not
being an absolute requirement.

Limits
As of right now, we are still sticking to these limits, and I'd be in
favour of keeping it
* 1 presentation max per person (not including pre-conf)
* 2 presenters max per presentation
* No limit on number of proposals per person

Agreed: presenter anonymity--