I'm newbie of Klipfolio and seems a great product!
The problem for me that I started in these days was/is to understand the difference between "your" functions and "Google Sheet" (or maybe Microsoft Excel) functions.
I saw that you translate every Data Source in a table (like Google Sheet do) and this is a fantastic idea.
Starting from this I need to think...
OK using Google Sheet for instance I can use COUNTIFS while in Klipfolio what I need to do?
OK exists the COUNTIF but only accepts one condition.
OK I can combine with AND function... MMMMM... how?
Let me open a ticket :D (and I'm blocked again)
These functions could be aliases of other functions that you have but is very important for a user to add the functions using a "language" that already known without reinventing the wheel.
I suppose that a lot of your customers are already a Google Sheet/Microsoft Excel master so this could be a good idea for me.