Bob,
this is (potentially) a very important issue that has not been standardized yet.
Although what you say does make sense, it also , in my mind, is an unsettled solution.
Which leaf shape to be the dominant and which fine detail NOT to be ignored...? It's a very delicate matter. After-all, it's the details that make the difference in important things in life :)
I firmly believe that not only leaves but also the fruit should be catalogued as in all possible shapes that the tree may produce. Only then , sometimes, one might see exact resemblance with what he/she has in hand to Identify.
I'm not saying it's going to be easy but for sure is going to be the best archival information we as a society can put together, together.
*Each picture I posted in your thread is of one specific fig variety , so, 4 pictures/4 varieties.
I also have pictures of fig fruit that have different shapes , although, from a same tree...interesting yes?
**I could send you a copy of prelim and non-complete list of "Names & Synonyms" project, which is slowly taking shape finally.
I am thankful to many, many generous and knowledgable forum members who contacted me through either the thread, PM or eMail, whose without I couldn't collect such massive amount of information. This tells me there are many fig enthusiasts who are looking forward seeing this project succeed.