I mean, we all know the rules. The players know the rules. This wasn't a "coach's decision." Once Savard is healthy, the situation no longer necessitates the emergency recall.
A simple, "Savard is healthy, so he's in and Carlsson is going back to Cleveland. We really were impressed with Gabe's minutes while he was up with us, he really did X,Y, Z well and it's great to know if we need to call on him again this season that he'll be ready for the job" (if that's how Torts feels) would have sufficed.
If it's more that he likes Carlsson over Harrington, but can't keep him up because of the roster freeze, then it seems like a shot at Jarmo for re-signing the organization's *11th best Dman* to a 3-year, 1-way contract whom Jarmo won't waive.