Set pre-defined styles for nodes
Rather than having to change colour, font and size for each node individually, to be able to define a style by name, and then attribute that style to any node in one click.
This would really improve workflow.
Tejus Phadnis commented
This should include the ability to set the node style by the level of the node, so central node has one style, level 1 has another and so on. That way you can have a way to easily structure your maps and zoom in or out to the right level.