The ability to name each Data Source with something more descriptive than "1 Script", "2 Script", etc. will be helpful. Currently, I have a report with 23 Data Sources, so trying to remember what they are is difficult.
This will be added in 8.0.4 - We've added a name attribute to script data sources that allows them to be easily labelled.
The script is the only data source you can't name. The reason we didn't add names to scripts is one script can define multiple data keys, and we were concerned that people would think the name of the script was the data key (like it is for queries, etc).
@Kathy A.: Please see attached. I put a comment on line 2 of every script, but I have to click each script to see what it represents. What about if you added a description after the scripts like you did for queries, e.g., "8 Query - QueryMachineRejects". It could look like, "1 Script - MachineDowntimeParetosByDuration".

@justin.d.clark: I've made a feature ticket for this.
@Kathy A.: Thanks much!