Move Holl elsewhere. Mrazek and a 2nd for a 6th going back...Holl can't be included

Holl can be showcased for the regular season then traded at the deadline, netting Chicago additional assets. The Hawks are sacrificing next season anyway.

But he blocks two good prospects who belong in the NHL next season (Ian Mitchell and Alec Regula) so more harm then good

There's the possibility the coaching staff would rather both of them get top pairing minutes in the AHL and develop more facets of their game. If anything, the coaching staff can split the games played between Holl and Mitchell if they feel that could ease Mitchell into NHL level play. Regula being 21, he may be in a situation where he is too young to translate his game to the NHL at this time. Let him prove his consistency in the AHL for another year and next year he can make a really strong case to be in the NHL roster.

They both are ready and will fight for a spot; it's widely reported. Part of rebuilding, isn't acquiring vets for 3rd pairing minutes, it's to develops players that have already spent time in the minors in sheltered roles easing their transition. Holl is simply a liability to the Hawks given Murphy and Seth Jones in the top two spots.