Looking through the forums I saw a thread suggesting that shields list how many slots they can take, which reminded me about an issue I noticed with the website: it does not say which weapons can be used with a shield.
Well, that's not really a problem, right? 1-handers can be used with shields, 2-handers cannot be used with shields, and polearms cannot be used with shields.
Except for the Goedendag, Bastard Sword, Heavy Bastard Sword, and Longsword, which are usable with a shield.
And about half of the polearms, which can be used with a shield. I was going to take the time to list all of them, but then I remembered that I don't actually know which polearms can or cannot be used with a shield. There isn't an easy-to-apply rule, such as length of weapon because the Ashwood Pike (166 reach) can be used with a shield but the Awlpike (165 reach) cannot. The Voulge (124 reach) cannot be used with a shield, but the Military Scythe (155 reach), a side-swingable weapon like the Voulge can be used with a shield.
In short, if someone who has been playing this mod for two and a half years can't remember which weapons can and cannot be used with a shield, then how can we expect new players to, the ones who will need that information the most and won't necessarily have a clan member or friend to ask?
tl;dr add shield co-usability information to weapons on the website