I'm fully on board with @Skoll_Shorties' opinion that Thrall should use the Doomstone to reimpower the Doomhammer since it's now been drained due to the events of the Legion epilogue.
Great way to wrap up that secondary plot line, including Magatha.
The Doomhammer is Thrall's iconic weapon it feels weird not being in his hands. At least with Anduin it feels right for him to wield Shalamayne because its what Varian would want. Meanwhile Thrall is still kicking.