Removing any sort of morale system also runs the risk of the game either becoming far too grindy and lacking in dynamism if lethality is too low, or the game becoming too lethal so entire units get wiped out in single activations because that's the only way to avoid the eternal grind.
The Necron mirror match in current 40k has this problem, where the army isn't lethal enough to overcome its own tankiness, and battleshock is a worthless mechanic so by turn 5 very little has actually died and it's difficult to really feel as if anything of consequence has happened.