Hi NickA
Thanks for sharing your feedback .
However , i would like to share alternate approach if this helps .
1/ You can have parameter such as pDate set with relative date
2/ and then create LastLoadDate as
3/ Create Insights picking LastLoadDate .
4/ Customize narrative and create computations
5/ Use that computed field as part of Insight editor and create Title/subtitle
Let me know if this is helpful.
Thanks
Neeraj