This is quite the case. When I logged in on expansion launch, the first thing I did was check the broker for what the new "white" set skins were... oops all reskins.

Then through the dungeons we got 2 new sets, the rest? reskins. New crafted gear at beginning of raid tier? reskins

With EW for a DoW/DoM the only new skins have been:
Relic
Thavnairian Dungeon
Garlemald Dungeon
Tome Gear 1
Tome Gear 2
Raid Gear

Every other set added this expansion has been reskins.

Small indie company can't be bothered to make new assets I guess.