Hi Olivier and all:
After to classified the improvements make into Calc or LibreOffice related with Calc, from LibreOffice 4.2 to LibreOffice 5.4, this are the statistics about Calc:
Introducing Calc : //_/19 Improvements/_
Entering, Editing, and Formatting Data: _/14 Improvements/_
Using Charts and Graphs: _/6 Improvements/_
Using Styles and Templates: _/2 Improvements/_
Using Graphics in Calc: _/2 Improvements/_
Printing, Exporting, & E-mailing: _/8 Improvements/_
Formulas and Functions: _/27 Improvements/_
Using Pivot Tables: _4 Improvements_
Data Analysis: _/1 Improvement/_
Setting Up & Customizing Calc: _/5 Improvements/_
Out of Topics: _/23 Improvements/_
Total Improvements : 111
Those improvements commented not include Macro because I don't understand them very well. In Out of Topic, we can find some about Color Pallet, Math and others improvements like that.
I'm going to classified the 6.0 improvements and then I will communicate the results.
You can see a details of the classified made in :
https://wiki.documentfoundation.org/Documentation/Development/Calc/6.x
Those classified were made to try to update in next time the Calc Book 6.0. If someone want to join to us to contribute to do it , you are welcome. Regards, Jorge Rodríguez