I never said the user must be exposed to a DSL, I think you're overcomplicating it for the sake of overcomplicating. DSL can be used under the hood by the execution engine, but the user can be exposed to a simpler variant of it, either by clever hardcoded postprocessing of known commands when rendering the final result for human review, or maybe use the LLM itself to summarize the planned actions (although it can hallucinate while summarizing, but the chance is miniscule, especially if a user can test a saved workflow). My point was mostly about two things:
1) "it's unpredictable each time" - it won't be, if a workflow is saved and tested, because when it's run, no LLM is involved anymore in decision making
2) I did remove the UI, because I don't need to learn the UI, I just formulate my problem and the LLM constructs a possible workflow which solves my problem out of predefined commands known to the system.
Sure this is most useful for more complex apps. In our homegrown CRM/ERP, users have lots of different workflows depending on their department, and they often experiment with workflows, and today they either have to click through everything manually (wasting time) or ask devs to implement the needed workflow for them (wasting time). If your app has 3 commands on 1 page then sure, it's easier to do it using GUI.
Also IMHO it can be used alongside with GUI, it doesn't need to replace it, I think it's great for discoverability/onboarding and automation, but if you want to click through everything manually, why not.