Macros changes removal

This PR reverts the changes made to macros in 1.14.

The initial PR looked massive and I was not comfortable with the changes, but I merged it anyways. But the latest PR about fixes some bugs in the implementation -- and adding some more changes (#1213) really scares me.

So, instead of continuing doing big changes, I prefer to revert everything for now, release 1.14 and give more time for these changes to mature and eventually be merged again.