Modeling Features

• Calculated Columns
• Data Categorization
• Sort By Another Column
• Improved DAX Formula Editor: Function Help and Prototype

Get Data & Query

• New ODBC Tables connector (Beta)
• Improved to the Excel Workbook connector: better column type inference and faster load for data previews
• New Text Column Filters - Does Not Begin With and Does Not End With
• Enhanced Privacy Levels dialog

https://support.powerbi.com/knowledgebase/articles/489224-what-s-new-in-the-latest-power-bi-designer-preview