Hi Paul,
Greetings from Syncfusion.
Query: I noticed that the CellSaveArgs.RowData has the old value and not the new one
We have validated your query with the provided details. By default in CellSaved event, the original DataSource value for the record is present in Args.RowData. You can find the old value and the new changed value of the record by using PreviousValue and Value properties in Args. Find the below screenshot for your reference.
If you have faced any problem regarding this, then please get back to us with those details.
Regards,
Rahul