I don't. In my fencing days (some 35 years ago), I of course, to use Jeff's words, learned to attack and parry with my foil or my sabre. But I was a far better attacker than defender, so I had to finish the fight quite quickly to avoid losing due to my lack of good defense. This is why I could take part to but never win a french championship.
I don't, exactly for the reason above.
Agreed.
Also agreed. And the weapon is far more expensive to repair or replace.
No, penalty is per parry, not per weapon.
Yes, but
I think RQ is complicated enough, even if, basically, you are right. The material could also, but this is an extra layer of complexity, affect the way the shield interact with weapons: Wicker is ideal against swords slash, but as persians learned it the hard way versus macedonians, is useless against pikes.