I do love visual programming and I use n8n a lot for my side projects. I really like its "delayed debug" features, so that I can analyse each step of the flow weeks later than it happened (i.e, I can see why a webhook failed long ago and even replay it step by step).
One missing feature that I've been working on is a "export workflow to code" feature. This way, once you are finished working on a workflow, you could run it everywhere without the need of installing the full IDE.
Again, nice work!