You would expect something to do with Lordaeron, and there is a crest, yes
But armor looks more like their heritage identity is being a Scourge Acolyte
Everyone nowdays hates Sylvanas, so they can’t make her part of their heritage, sure (even though forsaken wouldn’t exist without her), but “good ol’ days of scourge” feel even stranger.
I’ll take Scourge Acolyte over boring-Lordaeron-human any day. Plus they already have human heritage armor, it would be stupid to have Forsaken use Stormwind-like armor but replacing the lion & eagle crests with whatever Lordaeron used.