That's fair. Indeed, I've found that general purpose programming languages are not the ideal platforms for DSL development (my previous comment about Scala's fitness in this regard should be taken as a relative statement). That is, there are many idiosyncrasies of the host language that leak into the DSL, error handling/reporting is hard and tends to obscure the code, and the eventual DSL tends to have a very hosty flavor.

What we need are special-purpose languages designed for creating DSLs.