It would be so much more useful from a UX perspective if pressing osc/fx select button displayed their three encoders parameters (just like the filter select button does: you see the parameter values instantly).
Right now it sticks to "Osc 1" or "FX 1", which doesnt provide any useful information at all, especially since the selected slot can be seen from the LEDs and the osc/fx types are written anyway when you finally get to the encoder parameters view.
Long pressing the select buttons is quite a weird work-around to get there (and takes too much time!), and tweaking the knobs to see the values is quite error-prone in live performance.
Same thing could be done when pressing the tune knob. Right now, you have to turn the knob and detune the synth to see the value..., not super useful in a performance context