Blizzard have shared another update on WoW player housing which details some of the interior decorations. Fairly standard XYZ placement options plus some advance options so you don't need to glitch to clip/float objects. You'll also be able to individually dye certain aspects of specific items with the example shown being dyeing the bed sheets without the rest of the item.
If you fancy a read: https://worldofwarcraft.blizzard.com.../news/24186690