I've noticed more frequently these days that the subdual script could use a bit of tweaking. Subduel, as of now, doesn't grant a negative bonus to AC when you wind a character. This can actually cause problems in hitting downed characters if you want to get them past that, or deliver that coup de grace. I've even had instances of being utterly unable to hit a character and them getting up from winded. I'd suggest adding a -5AC or -10AC penalty to winded characters for a period of about a minute (which is about as long as it takes them to get up)

I beleive the standard d'n'd rules state they should be denied their dex bonus (if any) and take a -4 penalty to AC

One thing to consider when this happens is that AC tries to act as a quantifier of how difficult it is to land a damaging blow to someone, and it can be made up of many things: fortified armor, nimbleness, natural protection, etc. If you knock down a heavily armored person, or someone with a skin like bark, they still have ample protection. It's why the dex mod is dropped, and a small AC reduction is factored in, but not all protection is instantly lost.

You can't go past winded.

If you want to seriously subdue somebody, use Subdual mode (subdued -> knocked out -> blacked out -> concussed), not Sparring mode (winded). All of the states in Subdual mode result in AC/speed penalties.

Perhaps I was a bit mistaken, Arkov. It might not be 'winded' yet the first state of subduel doens't apply any penalties seemingly to the AC of the person. I'd like to see at least a bit of a lower AC to represent the fact that they are on the ground, unmoving, so we don't see more people swinging at thin air after downing someone on subduel.

When you're in subdual mode, the first state (**Subdued**) should apply a -3 AC penalty and a 30% movement speed decrease. The second state (**Blacked out**) should apply a -6 AC penalty and a 40% movement speed decrease. The third state (**Knocked out**) should apply a -9 AC penalty and a 50% movement speed decrease. The final state (**Concussion**) should apply a -12 AC penalty and a 60% movement speed decrease.

These penalties last while you are on the ground and for a small amount of time afterward.