Allowing for a simple class='' option on each menu link. Once that option is available, then it will be up to the end-user (us) to define the class within your system, and chose to use it on the link. Updating would be as simple as changing the class name on the link in the editor.
You already do this for each 'block'. It just needs extending to the links within the menu blocks. Fairly simple feature, and one that wouldn't impact much on your system, but it would bring a lot of flexibility to the entire system, especially if you extended it to other items as well. Each 'item' (html entity) then has a class='' field that contains a user managed variable that could be controlled in your editor. I can imagine some very fancy work done, using this alone, and without you having to do anything extra after implementation.
Customer support service by UserEcho