I think it will get better. Oblivion and both Fallout 3 were not good for decorating at release. But, they toned down the Physics in a patch. New Vegas was better at release, but I think it got tweaked too.
The biggest issue is the player's homes are set to reset the position of stock clutter after a while. Which will throw your placed items all over the place. So, the Physics might be fine this time around (I don't know as I don't decorate anymore) but the item reset needs to be addressed.
I hope it gets better I have decorated in Bethesda games since Morrowind I would like to in Skyrim.
I had no problem decorating in Oblivion and Fallout 3 or NV. Even before any patch what so ever. Sure the item placement in those games was not ideal, in Skyrim you cannot even rotate the items or stand them up right you have to knock them into things to reposition them. Then after all of the tedium there is the exploding item bug where everything you set up ends up in the floor.
I hope its fixed because I think your house reflects your character and its good for roleplaying. It's something I have done with every character of mine in The Elder Scrolls since Morrowind.