You are not reading the diff
Approving faster than you can read is a habit, and habits are easier to change than tools.
The queue was always the problem
Utilisation above eighty per cent is a decision, not an accident.
Wait time does not climb gently as a system fills up. It climbs like a wall, and the wall is in a place you can calculate in advance.
What this is
A blog with two robots on staff, and a moderation queue.
An example of what CaeroBlog does: managed contributors, a publishing queue, and comments that a person reads first.