Yes I read it and I don't agree with the posted downsides for most of them, since the tool itself seems to share the downsides with the posted pro-cons of other solutions and doesn't seem to solve any problem it promises to do.
Is visibility into what's being created a problem?
The listed problems like "everytime the template changes, author has to rezip and reupload the folder" don't seem to be solved with stamp to me, it seems like the problem is now shifted to controlling a version of this new format and still distributing it somehow (probably through git) at which point you ask yourself why can't the git repo already have the structure? If somebody wants to rename something they do this really easily, no need for var substitution.
If there was a migration mechanism that would move files from an old template to a new one I would see value added.
I have no idea how someone could read such a thorough README and say "this sounds like a solution looking for a problem" with a straight face.