When I first joined Excelsior I had a nice conversation with Shaarlee about this. She had asked +Colibri, and the reply was no. This is because someone may get overzealous with the option and end up with house items sticking out of walls past the foundation limit, which would then need a GM to remove. The GMs have enough to do as it is.
For example: Last summer I irritated +Chaos because I could not remove a yard wand fountain, no matter what method employed. He showed up in a huff, said he had no problem removing it and probably assumed I was moron, rolled his eyes at me and promptly disappeared. Well the other day GeoFizzle had the exact same problem and had to ask for a GM to remove it. And I noticed a yard wand item (mushroom bunch) disappeared twice out of my game house garden. So there are definitely a few bugs here with deco stuff.
On a horrible low player base (20-30 players only) 100% custom shard I played a couple of years ago, they built in additional commands to move locked-down house items. These were:
I wish to move this North.
" " South.
" " East.
" " West.
The house deco tool already has Up/Down, and there is a limit in place of how many times you can raise/lower. Just add in limitations to not go beyond walls. However, this brings up another problem - custom house design. So many houses sunk, either to the foundation or an entire floor. With too many variables in place, I am not sure the nudge system would even work.
But let's face it. There are things on this shard that are incomplete or buggy and have been for more than a year. So don't hold your breath waiting for this change. But I understand he needs to have a life outside of this game, with a job, family, relaxation/vacation time, and personal relationships.

He should seriously consider getting another scripter. But I think perhaps +Coli is kind of a control freak and doesn't trust anyone else to touch the server.

So that's why changes such as these are never done, because he doesn't have enough time in a day to do everything on his own.
On a side note, when will Britain be renovated for Spring? That snow is depressing. Maybe they are not doing it because there are way too many bank-sitters in Brit. You lazy bums, get out of Brit so they can redeco! *laughs*