I agree that the turn based system does not do combat well in D&D over the editions. A lot of movie magic or real world aspects cannot be handled right. Nobody surrenders when a crossbow is leveled on them, they just draw their sword and attack. Even if they loose initiative or you give surprise, they know the PC is only taking a minor damage.
I tend to give more breaks to the PCs and the players by default. Taking the feat to be cool at something means that they are not as effective at something else and I should not look for ways to penalize that.