Show your work. Aside from his name and how he has played in the past, he offers nothing that Parayko-Mikkola, Faulk-Leddy, Rosen-Bortuzzo doesn;t. Krug is our worst D this year, by an unfathomable margin. He gets 71% O0zone starts and is sheltered from the other team's best players. He has the best PDO on the team. So he should have favorable metrics. He's the 2nd worst GF% and the worst is his D partner. His xGF% is right in line with everyone else, within a percentage point of the worst despite ridiculously favorable usage. He is the worst HD Scoring chance percentage of our D, again, with ridiculously favorable usage.
You are going to argue he is an asset on the PP? True based on results. But Faulk's underlying numbers are better, he just hasn't had the results. Krug is worse than Faulk in Scoring chances per 60 and xGF/60 on the PP. He is better than Faulk in actual GF/60 but he plays with PP1 vs PP2. Not sure how much that plays into it. But overall, his PP does not come close to making up for his atrocious 5v5.