Skoll Shorties

Maybe he don't see any use to armor, simply because he is THAT strong and know it. You could quite literally compare him to Thanos in MCU where he's seen as imposing with his armor but by the time of Infinity War he discards it because he grew so powerful he didnt need it anymore

He still looks like a chump and not as much of a badass as his silhouetted look.

Honestly i'm more interested in his part through the expansion, it matters more than some armor to me. WotLK had his main villain as a constant menace to us showing up everywhere and toying with us, lets see if they manage to do something like that this time.

What he does matters. Of course. But appearance also matters for a villain. Again you look at all the other villains or end bosses of World of Warcraft and they leave a lasting impression on you depending on their appearance AND action.