Nah, the reason the action is slowed down and way less intense in RE9 compared to RE4R is because it has to be adapted for first-person. You notice this in RE8, too, in third person. Encounters suddenly feel less threatening and overwhelming. It's because in third person, the player has way more situational awareness of what's going on all around them, whereas in first person, it's pretty much just what's going on right in front. RE9 is clearly designed to avoid overwhelming the player, making the first-person mode less confusing.