Lack of a local runner is my biggest peeve. Any novel GHA workflow creation results in a PR with 100 commits, until you can finally sort out all the non-obvious idiosyncrasies. For any modestly complex workflow, I move everything to a bash or TS file and call that, and then you can use _coding tools_ and a _local_ dev/eval loop.

How funny that GitHub Actions' lack of tools forces you to make a bunch of billed cloud runs with GitHub for workflow edits. I'm sure their PMs are very concerned about this trend.