Yes, agreed. I've found TOML for config to be quite nice.

This is my go-to article for discussions about generic languages vs DSLs: http://mikehadlow.blogspot.com/2012/05/configuration-complex...

I'm very iffy on DSLs in general. One that I'm using at the moment has foreach loops but no if statements! And... all the inputs must be specified in a YAML file!