Really... Aaron Paul auditioned for this shit and he didn't crack their top 3? If that doesn't shatter your confidence in the people behind the Die Hard franchise these days, I don't think anything will.
listen, i like aaron paul, but his work on breaking bad is overrated imo.
that... and he's just too much of a little skinny kid to be john mcclane's son. I'm not saying he couldn't do it, i just don't see why you'd think he's the best choice for that role. i can see why they might pass over him despite his obvious talent, because they want a burlier type