Question

Dear PreSonus, 

I understand you think you've solved the problem by only putting a Mono button inside the software, however we need a Mono button on our interfaces so we can check our mixes in Mono when we use other DAW's 

Answer 1

I have a Presonus Central Station+ that has a hardware Mono button.

Make sure in the future, you purchase a unit that has one. I rarely use it now as I listen in mono thru Studio One if needed.