Control and indicator references are currently 19 pixels tall. They should be 16 pixels tall. References would then align better with other items which are already 16 pixels tall, such as the Bundle By Name and Unbundle By Name nodes.
I second this idea. When initializing a cluster of references, this larger size quickly clutters up the block diagram.
Another spinoff idea for this is to allow smaller Reference icon sizes to be chosen, like the Property Node 'name format' options 'No Names', 'Short Names', 'Long Names'. If one could choose a 'no name'-like sized icon, this would unclutter the block diagram, especially when initializing large clusters.