Custom column names for Discover tab columns

I am adding Discover tab in a dashboard. However, by default it takes field name as header. Can that be modified to have a custom name to make it more readable?
I am following Scripted field approach but I have concerns related to performance and rework if just the column name needs change.
It can be done using Data Table but I find Discover in Dashboard a better option as it can be expanded and doesn't have a limit on aggregations.
Any thoughts?

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