I found a way to get full support of my FaderPort Classic in Adobe Premiere Pro CC.
Just copy the FaderPort.bundle from the package content directory in Audition CC to the same location in Premiere Pro CC.
… done!
Copy from:
/Applications/Adobe Audition CC 2019/Adobe Audition CC 2019.app/Contents/Plug-Ins/ControlSurface/FaderPort.bundle
to:
/Applications/Adobe Premiere Pro CC 2019/Adobe Premiere Pro CC 2019.app/Contents/Plug-Ins/ControlSurface/
Hope this will help someone…!?