Power Restoration and Defense and other questions

Yes, unfortunately it does do a bad job of explaining. Here's what I know:

- Power Restoration and Defense refers to powers that restore shields (and health?), such as Biotic Charge or Energy Drain. It would increase the amount of shields restored while using those abilities. Presumably it does the same thing if a power gives defenses such as Damage Resistance.

- Damage resistance reduces incoming damage by a scaling formula... that they don't tell us. I know that 100 DR reduces damage by 50% (you take half damage) because a hint said so. But I also know that 200 DR doesn't make you take no damage, so past that I'm lost.

- Shield Regeneration is the speed at which shields recharge, that is: The amount of time it takes from when they start recovering to when they're full.

- Shield Regeneration Delay is the time between taking damage and when the shield starts to recover.

Feel free to ask more if I didn't explain well enough.