I'm starting to think that maybe we should just leave everything in that isn't immediately speediable, let things be merged and redirected at the will of the people, and finally let Wikipedia 1.0 sort it all out.
I don't think that's a good idea. The speedy criteria are purposely limited to specific cases. Most people won't argue the fact there's definitely articles in existence that should clearly be deleted, but don't fit a particular speedy criterion because we couldn't come to an agreeable phrasing of such a criterion.