Most of us know now that the Emblem Editor is returning with improvement. At the time of posting this, whats improved is unknown, and the following ideas may already be implemented, but I'm putting them out there, just incase.
The main feature that would be really useful is to merge layers. We could see some really amazing emblem creations with this option.
Hopefully the developers see this post too.
Thanks for reading.
(To those who say that Black Ops 2 is an FPS game, and not an art game, so it doesn't really need an emblem editor, or its a waste of time, etc., well.. if you don't like it, don't use it. )