Is there a set of best practices that a developer should know about to create the best looking exports of .rdl reports?
Thank you for your interest in Aspose.Slides.
I have observed the question shared by you and like to share that Aspose.Slides exports the MS SQL Server Report as it is to PowerPoint. There are not any compulsions in this regard. You may please try using Aspose.Slides for Reporting Services on your end to render the reports to PowerPoint presentations and share with us if there is any issue incurring.