Hi @gabriel, i think you could maybe try taking your actual legacy structure and try to adapt it to -more or less- follow the 10-19 Concepts instead of redoing years of work to fix a template (in this case life admin), that maybe is not optimized for your particular workflow.
As an example there is a screenshot of an JD structure i started 2/3 years ago on my former job, specifically purposed for technical documentation.
At the time, the core JD concepts were a little bit different, and there was not a life admin template, so i started “numerating” my existing folder structure, and moving things from one area/category to another on the fly finding what at the time made sense to me.
If you like more info you could see my original post from a couple months ago (from where i took the screenshot):