Thanks Bruno. Same for you.
I managed to get some time these vacation days to get the new argument variables added.
They will be available in Tiki since version 14.0.
You can also backport this change into your own Tiki, to get them added.
P.S: The other points you indicate are too difficult for my skills and time available ("2. Define a list of people to aprove the version)". Regarding "3.", you can add the corresponding wiki argument variables to the page content, so that when you view the page through the links in the wiki page history, you will see who approved it, when, etc. (if the page version was approved)