Using macros for combos

[MalitiasTT]

They intentionally didn't do this because they want macros to be poorer in combat than pressing your buttons.
So it'll likely never happen.

I think you misunderstood.
The idea is to combine more of the decision (like single target default 1,2,3 rotation) into a combo button.
You're still pressing your buttons at least once every GCD and, like Shurrikhan said, this doesn't reduce the number of times your press your buttons.
The changes to the macros I suggested also wouldn't make you able to bind your whole rotation (which would include all of your burst abilities) onto a single button,
because fights have varying downtimes, which can't be accounted for with a macro.