I'm not sure I like what I see in regard to prisoners.
The idea that you can take 10.000 horsemen prisoner frankly sounds ridiculous.
In the second Demo I set up a custom battle using Montebello. I ordered a 14.000 men strong pure Austrian infantry corps to defend on line. I set up the battle in such a way that this corps would be attacked in the moment of reaching their defensive line.
The attacker was a pure French Cavalry corps incl. one horse Artillery battery. 7500 sabres.
The result was, with only minor intervention by me, that the whole Austrian corps was taken prisoner in under 2 hours.
Today, I saw a squadron of hussars being taken prisoner by unsupported enemy Cuirassiers, only 300m from my defensive lines.
In another battle, a squadron of chevaux-léger was "arrested" by an infantry unit, which was , iirc, in square.
Yesterday, I took 1500 dragoons prisoner with just 400 hussars. The dragoons had come under fire from 2 batteries.
So, my point is, sometimes it makes sense and sometimes it's very unrealistic. I think this feature could use some reviewing in the future.