You need some citations on the Defense bug. There's not a lot of info on it out there, and if it didn't exist, Defense Rating would easily be top priority over Shield and Absorption.
The only sources I have, technically, are personal experience and talking to other players. If you're unsure of whether or not it exists, I could try to record some gameplay and show you, because it happens to me almost nightly at least once (even with my mediocre 18% Defense chance.)
You should also mention that Force/Tech attacks can't be Shielded, so against enemies that use those exclusively, those stats are wasted.
Good point. I think I might just quote and cite Gisben's post about that in the guide, since I actually was not aware of that until he pointed it out.