Light

I don't necessarily agree, yes they are related in that a person with out a good starting health will not have good stamina. However there are numerous real world stories of solders who have taken out multiple enemy combatants or defense positions in order to save their comrades even after being mortally wounded. In game terms that is Health draining away while Stamina keep the character in action.

I have noticed this issue as well. Primarily the disappearance of equipment. I had a Quarterstaff that my PC was using vanish on me as well as my Priest's Warhammer. Also some items found while on quest disappear when moved from one party member to another. I have not noticed this issue with any abilities. As for characters getting locked I will need to double check to confirm that behavior.