That's something I've looked at and I'd agree. You have more information on how you're off when you're in a compromised position with irons than with a dot.
...and I think "index" is poorly taught and understood. But that's a whole bucket of worms I'm not going to dive into on the interwebs. But we can probably get into that at Tac Con if we happen to be around the admin building at the same time.