It's not writing him off. He's got value.
The question is if he is a good fit for the future here. We know Vlasic will get 23ish minutes on the left side. If one of EDM, Allan, or Kaiser shows they can play over 20 minutes a night on that left side, then it makes KK less of a fit. If Lev is on the top pp unit in the future, that makes KK less of a fit. If Rinzel's offensive game translates well and he becomes an option for that 2nd unit, KK becomes less of a fit.
It's much better to keep him than to give him away for less value than he's worth. But if these things above all happen, and another team is willing to give up good value for KK, than that option needs to be explored.