When he offers to take you to Titan, and you stop over at Cauthess station, you can take a peek into his car with the camera. Tbh all I remember is a photo of a girl leaning against a car, and some other document in there as well. I remember legs, and a nice pose. Could be a business card? I dunno.
Perhaps the "cutting of his leg" part was a bit too extreme, yes. Perhaps someone tried to smash his hip or something would be more plausible?
Speaking of savagery against Noctis, I've never encountered this move while fighting Ardyn. Honestly, I'm starting to wonder just how many more things I've missed. Quite a stance for someone with a supposed hip problem, but then again his left leg ain't exactly moving since his right leg is taking the weight.