Laundry list of desired features:

1. Export Query to Dotnet SDK Project.
2. Import / Export CSX (C# Script) Files
3. Incorporate the C# Interactive Runtime and add immediate window, Like Visual Studio. Would be a huge help during debugging.
4. Add Unit Test Management with support for MSTest, nUnit and xUnit projects.
5. Seriously consider adding a Report Builder. LinqPad is already 75% of the way to replacing MS Access. This could put the nail in the coffin for MS Access.