Most Man of Steel reviews have complimentary if very brief remarks regarding Russell’s Jor-El as well as Costner’s Pa Kent. This from Flickering Myth.com goes into greater detail:
Getting an enormous and welcome amount of screen time is Russell Crowe as Clark’s birth father, Jor-El. This is not merely a ten minute role, a quick days work. No, this is a role that requires investment from Crowe, to deliver his best and sell the fathers devotion on just the same levels as Costner. Do not expect a placid and reserved Jor-El, a wise elder; he’s a scientist yes, but he can and has to get his hands dirty. There’s a lot of interaction with Michael Shannon’s Zod, which makes for fantastic viewing, as the two Kryptonians relationship and battle of wills is deeply explored.