It's not common, it's literally the only weapon you'll use this entire expac.
How is it different from riding Mimiron's head, weilding Sulfurs, Thunderfury, or any other Iconic weapon from past expansions? Did you complain about TF at 60, since it was actually in the game and a bigger deal than Doomhammer?
You have a poor imagination if weapon art makes you cringe. NPC's only react to you, the Death Knights only say the Death Lord is around when I go past them... not every time someone does.
At least I personally never said to imagine they aren't there, I said to imagine they are your Death Knights under your Death Lord rule. I assume other classes have similar titles. You can easily make up your own story or has TV and video games ruined peoples ability to think and create ideas for themselves? You're literally making this your problem (and others that feel the same) while the majority, in my experience, of people are enjoying being the chosen one.