Well, it’s not a “clutter program” if you have not downloaded ALL the required application/driver for your specific Scarlett 2i4. It’s not a third party application, it’s definitely specific to Scarlett Series. Yes, midi port assignments need to be made as well as whatever DAW (I use Reaper) you may be using and then there’s sometimes need to ‘Record Arm’ a Track in DAW to be able to actively Hear routed instrument(s) for that Track in DAW.
Hope it helps. There’s a well documented user Manual download read me file with Scarlett Mix Control.