LL, the key players know the results. How and when they let the public know is up to them. They're probably waiting on the written findings to make comment.
As far as waiting, because the arbitration is leaning toward the plaintiff, well, if I had rendered a decision and felt someone was going around it, I would make a decision fast, just to make a point. I think he's hoping other actions will make this grievance null and void. If the merger were forced to go forward, there's no need for this to continue worrying about shifting equipment.