Unfortunately, I am much too aware of using these cave-man tools.
As I'm sure you know, these and any other tools currently available to us require extensive invasion of the Macro itself with debugging Actions, which can in fact cause unintended problems. And, none of these are dynamic -- a Display Text Action would have to be placed after every action where the target variables can change.
And, seeing the other non-target variables often leads to a quicker fix/solution to the issue.
So, I would ask that you reconsider this request, and provide this essential debugging feature sooner rather than later.