I'm not sure if I'm being redundant, because I reloaded a few times and see that _many_ posts have been made in the short time since I started looking at this article and reading comments. But, the discussing seems to be bifurcating into different camps. Do you assume that the blog and discussion are narrowly scoped to sysop/devops problems, or a general diatribe on programming languages and product design?
For product design, a big part of the problem is choosing your audience. The blog author mentions being happy with a prior ops DSL because it let him think he's not being a "software developer". In my opinion, to target this type of user is to always be on the treadmill of toy DSLs. You have to over-simplify something to appeal to someone who wants to use it without deeper engagement in a programming/software development mindset. But then you have other users who hit the toy's limits and want more, and you either provide two entirely different products or start compromising the simplicity to add escape hatches. In the end, I think you'll always find that you need more of an API/framework in a proper programming language if you want to support all the use cases with one solution. Or you make a poor approximate of a programming language, quite likely repeating most mistakes in the ~50 year history of scripting languages.
There has been a lot of this churn in the sysop/devops space where system administrators are being given more complex and dynamic deployment problems. (Facing their devops mirror-world where programmers are being given more operations duties). This tension also exists in other domains, but I'd say the systems operations space has much more stark culture of "scripting" and "config files" as a distinct thing from "programming" and it shows in the tools and perspectives.