Hi,
I'll do this in my local installation, and I think it would be a minor yet interesting change.
It would required one less '3rd party' dependency, or, to be fair : a dependency native to python 3.3+ and most of the time included with python when distributed. (and there are far less transitive dependencies than with virtualenv package)
Arch includes it in python3 package, debian-like have a python3-venv
package.
Posting this here in case you think of a reason why not to proceed that I could have missed.