In general in Labs we don't have a large need for a queuing system right now.
Of course, because nobody is using it right now. I suppose Toolserver didn't need it when it had only a few users consuming its resources.
Does this mean your efforts were wasted? Of course not. Your efforts helped keep the project running, which is important. Just because your file was replaced with the production copy doesn't mean the work put into it was for nothing.
Amazing! We should suggest this approach to the editor engagement team, the post-edit feedback could say "Your valuable edit is now visible to the world. It will probably be reverted in a few minutes, but you can still be proud of it, knowing that the new revision written by someone else is much better!".
Nemo