I think you can already, just adjust the sword in the tile, moving it up and down, left and right can alter where it appears from.
Anyways, I think this needs to be implemented very soon as it is an important feature that can seriously dampen a quest if they wanted to use Big Link, which many people want to do, and since the big link has been added, this should be done as well, maybe modifying the Big Link Hit box to make it work? At least until a customizable version can work.