Hey armingrudd,
I have added your feature-request. Thank you very much for the suggestion!
However, I don't understand why you have to use the PERCENTRANK.INC function in Excel. Attached you will find a workflow that does the exact same thing with the Rank node and a Math Formula, or did I miss something completely? (PERCENTRANK.INC value is included in the data as reference).
Cheers,
Ferry