Thank you for your interest in TestStudio.
Although TestStudio is not designed to directly handle writing your output back to an Excel/xml file through generic steps, the functionality can be achieved through a coded step. This example from our online documentation regarding Coded Steps will demonstrate how to Write Into the Data Source.
As far as creating a Test List of Load Tests, this is a current Feature Request in our Public Issue Tracker and would make its way into a future build pending enough interest from our voting system. Place your vote through this link to the feature request.
Let me know whether you have any followup questions.
All the best,
the Telerik team
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