It would be nice if more then 10 data points could be defined. For non linear characteristics, 15-20 points would be more nice in mind. Though I understand for display purposes and with the usual 5-10% accuracy of NTC sensors this might not be too vital.
Also an export/import of these values or a single source definition an then the assignment to inputs ( similar to triggers and actions if I am not mistaking) would be nice.
The 10 point limitation is just for practical reasons as UI can not comfortably fit more. It would become difficult to move the points. Adding more requires UI redesign for that popup.