The incorperation of broader programming principles and concepts that have evolved over the course of advancements in the creation of software systerms into other language-based fields including mathematics and standardization of these languages to lessen ambiguities.

Things like using variable names that make sense rather then the current single-letter + subscript limit. Using easily typable characters and combining those to create complex operations. Substituting language for obtuse symbols. Simplification of expression syntax.

I don't know best how to put it in your terms, nor what I'm missing, because these are things I take for granted being a programmer.