I often use the FX version of Serum 2 to modulate the oscillators with the audio input for fun sound design. However, I notice that when I load presets, the OSC section is always blank.
I'm guessing this is intentional design, since the FX version of Serum is intended for processing incoming audio.
However, I also find Serum FX it very useful for creating standalone instruments. It would be very useful if there's an option to load the OSC section when loading presets in the FX plugin.