The big advantage is that the spreadsheet shows actuals and potentials for each player, as well as, the custom weight formula for their position.
I've just created a demo and updated it so the custom weight formula is directly in the spreadsheet.
Check out the demo:
https://youtu.be/iXij1MyCSaM
Screenshot:

Training Camp.xlsm:
https://drive.google.com/file/d/1GPLV8Et7hdast9O7nEp0QcUC99qXjxKl/view?usp=sharing
Note: I don't think the spreadsheet is compatible with LibreOffice, but I may be wrong.