That would be cool and I suspect he'll do something after this, but keep in mind that he was knocked off balance with the parry Elma did in the previous page. He was in no control of that sword weight at that point.
That... doesn't bode well for the literal only other person in the room. Good thing she wasn't considered important anymore, else Laura's head might have detached by that night
I'm pretty sure he was reacting to the fact that her eyes were not just sliced. It was cut multiple times over, with scarring all over. It was a messy endeavor, and you can see why she's so unstable.
They assume that there's no magic to enhance their hearing? Or prevent it from being sonic-bombed? Or to bypass silence magic? Or to hide in the shadows for recon? C'mon gramps, put a little imagination.