What rosh means is that he wants characters to die when they run out of stamina.
I'm sure modders will quickly create a "Pure Infinity Engine Experience" mod that does just that.
I know he does mean that, and such a mode might be interesting. The problem being that if the game is balanced right it would take out half the fun out of the game, as it won't have the whole strategic resource anymore.
...Unless, i guess, you also keep the health as is.
Mmmmh..... the easiest way to do it would be to increase the variables of the enemies to attack your K.O members, as well as a direct hit to health when the member is K.O.