It's that he's not what his numbers have said about him. We've had massive issues on defense and after the first handful of reasons - then you can look at Risto. Is he perfect? No, but he's a good player. He's tied for the 41st highest paid defenseman and at this point - is tremendous value.
Defense, IMO, is the hardest position after goaltender to hide not having a good game. His issues get way over blown, IMO.