Ha! Well not too much response here...

Anyway @Pedro:
So I do not have too much time to work on an updated template. But I have
added a somewhat updated template file to my emacs-lisp repo here
<org-babel-execute:template> along with some handy tips
<https://github.com/dalanicolai/dala-emacs-lisp#ob-templateel>.
Then of course you can further just check out examples of other ob-....el
files. Hope this is useful.