I know what Corsi is, but it has to be used in context, it's not the be all and end all.
My point is simply that Manning doesn't have terrible stats, nor was he sheltered, and his PDO is 97.5.
MacDonald, Provorov and Hagg get the toughest matchups, Sanheim, Gudas and Ghost (though this will change) the easiest.
Manning is not a good player, but he's not trash, he's what w have had and most teams have on their 3rd pair.
When you get past the top 120 or so defensemen around the NHL, what's left isn't going to thrill most fans.