Vector graphics for the Map editor and viewer would lead to a massive increase in functionality and usability for the Maps component.
Being able to edit maps with the GUI rather than manually entering coordinates would help as well.
SVG support would mean access to more 'clipart' to build Maps with, eg one could build a map of an entire rack with picture of the front of switches, servers, etc.
Some samples: http://www.carto.net/papers/svg/samples/
In fact you could conceivably build the entire UI with SVG!