Hi Requios,
Currently in 4.8, reroute nodes have option to show comments only on individual nodes, and you would need to turn them each on. There isn’t an editor preference. There is, however, an additional feature request in our system for additional functionality (UE-12866), and we’re re-examining how this will be handled. Once this is completed, we’ll probably see reroute node comments work same as comments on other nodes (shown by default, and pin-able individually).