Last time I'm aware the monarch did something, it was the firing of the entire Australian parliament and calling a snap election. Which is quite a sensible thing to do if parliament is completely jammed, and since it was reasonably sensible and popular in the situation it happened, nothing happened to the monarch. (Imagine if someone had the power to do that to Congress! Maybe they'd actually do stuff again, and we'd have to rename them to Progress)
This is an alright use of a monarch IMO.