When you're making changes in a module that sits low in the architecture canvas, you need to manually republish many modules up the layers before you're able to test your changes.
It would greatly reduce the pain involved if we could create something like a "1-Click Publish queue" in Service Studio and add modules to it. Then, with 1 click, SS would publish the modules in the queue in the order they were added.
Suggestion: select the modules in SS with Ctrl+Click, right click, then "Add to new queue".