Every sound developer has its unique style. Fanan team develops software sounding like late 90s small boxes such as like Yamaha sound modules and effects sounds like played outdoor through common PA system on live events. This fits very well into Solina2K, Gala is not that good fit, but this style do not fits with organ. Its simply not smooth enough and effects make it worse instead of improving.
From technical stand point organs are impressive. They have 2 sets of drawbars and lot of switchable organ types.
I take Scandi Clavia 2 as an experiment.
Author should focus programming stuff matching his sound style. Drum machine from 90s will be good, general MIDI sound module would be good, after listening to his effects - tube resonator effect would be good, it sounds very close to his style, reverb and delays sounds like live event PA systems - so why not to rework it into PA system emulator? I don't remember we have any outdoor PA system emulator. Also author sound is similar to dry recording with cheap condenser microphone. This can be reworked into unique effect VST as well. Extending Solina2K can be an option, just drawbar organs are good fit for Fanan sound.