The cinematic kills are when the last strike would have killed you anyways . . . .
Yes. This is a pointless complaint. The enemies aren't magically 1 hit killing you,
they would have killed you with one hit anyway. This way just means they're doing it with style. I mean, would you rather they just did the standard slash animation and you fell over dead, instead of going out in a blaze of awesomeness as the dragon swallows you or the bandit runs a sword through your heart?
You have to remember that just like YOU can get critical hits in combat, so can the enemies, so just because their last few hits didn't do as much damage doesn't mean the next one won't be devastating.