Patrick Zadrobilek has developed a tool that replaces the lost Direct Link to Speedgrade functionality in CC 2015.3. PrProBCC (Premiere Pro Back Compatibility Converter) allows Premiere Pro CC 2015.3 projects to be opened in Speedgrade (version 2015.1), graded, and reopened again in Premiere Pro CC 2015.3. The only limitation is its for Windows only.