In truth that always sort of bothered me. Darkwood is too cheap if it is going to completely get around a feat. What is it, 254 gp (iirc)? That really undercuts shield prof.As quoted. Note that a masterwork light shield or buckler has NO armor check penalty. Ditto for a darkwood or mithral heavy shield.
So a rogue can use a shield w/o penalty. it just has to be the right kind of shield...
In this case, I think, actually the opposite problem is true. It's not a pointer to the item being too good; it's a pointer to the feat being too weak to be worth a feat slot.In truth that always sort of bothered me. Darkwood is too cheap if it is going to completely get around a feat. What is it, 254 gp (iirc)? That really undercuts shield prof.
That's a good point. It is sort of interesting that you could similarly make the feat more powerful just by increasing the penalty. If you got no benefit of a shield without the feat, it'd suddenly be a more powerful feat. Kind of an odd relationship.In this case, I think, actually the opposite problem is true. It's not a pointer to the item being too good; it's a pointer to the feat being too weak to be worth a feat slot.Think about what Shield Proficiency actually does; most of the time you're talking about removal of a -1 penalty to certain rolls (not all rolls, just some) under circumstances of using a specific type of item that not every character uses anyway.
The feat has existed since 3.0, back in 2000, and in all that time, I have never once known a player who took the feat for any character.
Of course, some classes get it free, but again, I think that tends to weaken it as a feat rather than the reverse.
IMO it should probably be folded into one of the Armor Proficiency feats, like Light Armor.