Typically developers care about this, business buyers don't and they direct budgets and in many ways, product prioritization. To a large extent the proprietary or obscure nature of integration DSLs never helped bootstrap any meaningful tooling for users.
That's changing though with developer-power driving prioritization and investment. In our case, we hope to make good progress with an upcoming project called Flogo. Currently in stealth and soon to be OSS.
Disclaimer: I work at TIBCO on integration