They look very outdated, like ancient Android versions.
I suggest adding more optional customization to those messages such as rounded edges and different background colors.
The new selection dialog option is the only customizable dialog for now unfortunately. I think the reason it has not been done yet is because it's hard or takes time. I can't be sure however.
I didn't know that, but the whole point of MacroDroid for me, is being able to create automations easily and without being required to understand coding or programming.