It should be similar to any other automation tool - they allow for live building, testing, and debugging. I need to be able to run each action and clearly see the input and output, and test my workflow step by step instead of building the entire thing and testing it all without knowing the input vs output and hoping that it works. I find it difficult to build workflows in GHL confidently, unlike other platforms (n8n, Make, etc.) where you can clearly see what you're dealing with.
An implementation similar to n8n's Logs drawer would be a great start!
+ Exposing the input/output when viewing a contact execution path when the user click on a certain action would be a simple first implementation.