We were missing a 3C. We had Reaves (like him or not, we both know he's here for reasons outside of being the best option in terms of his play) plus Rowney, Wilson, and Kuhn. All three of those guys have been good enough to be full time 4th liners on Cup rosters. JR left one hole on this roster to start the year, and imo underestimated how much of our 4th line's effectiveness was because of Cullen.
You make it sound like he went into this season with 4 or 5 holes in our bottom 6. He didn't. He had a hole at 3C, he trusted Rowney more than I would have (and only after waiting on Cullen), and he wanted an enforcer. It hasn't worked out. He's certainly got work to do. But he had a pretty reasonable (albeit conservative) summer.