I've started a playthrough on PotD, and I was very annoyed to find when I checked the combat logs against Benweth, he had 10 penetration with a fine saber. The detailed breakdown was 7 saber + 1 fine + 2 PotD.
So PotD gives +15 to accuracy, +15 to deflection, and +2 to penetration.
I feel like it would be easy to put this in the tooltip when you select the difficulty at the start of the game.
The reason this troubles me is it makes me question even more the point of light and medium armor without AR bonuses.
Even with base penetration, you have 7 penetration with most one handers against 7 on medium armors base AR. So that actually makes base AR for most weapons like spears, sabers, etc actually 9 on PotD, making even the base AR on heavy armor equal to the penetration of a base saber, meaning they get penetration, e.g. 100% damage. Would you not be better off just ditching armor rating above 5 in PotD unless you can somehow get at least +1 AR and heavy armor on a tank? The recovery penalties are not inconsequential, and penetration above = doesn't really matter until it doubles out.
Luckily I built my crusader-faggot to have an AR aura and unbroken, so that trying to get
some underpenetration is not completely pointless on him, at least.
I am not a huge fan of how the armor rating system works...