Maybe there are editors in development; I do not know.
However, one needs to keep in mind, that Blizzard keeps monitoring the SC2 MPQ files for modifications to detect hacks and similar stuff.
Due to the nature of a modified editor, it would be possible, even likely, that Blizzard detects it as a hack and bans your account for using such an editor.
This is just speculation, though.
However, if there is a desperate need for an improved editor, the community will eventually find a way to create one.
Maybe its no problem at all.
If you want to create such an editor, go ahead :). I cannot help you, though.
Maybe there are editors in development; I do not know.
However, one needs to keep in mind, that Blizzard keeps monitoring the SC2 MPQ files for modifications to detect hacks and similar stuff.
Due to the nature of a modified editor, it would be possible, even likely, that Blizzard detects it as a hack and bans your account for using such an editor.
This is just speculation, though.
However, if there is a desperate need for an improved editor, the community will eventually find a way to create one.
Maybe its no problem at all.
If you want to create such an editor, go ahead :). I cannot help you, though.