I am in the boat of wanting a less expensive and way less functional TX-6.
Essentially your live streaming audio interface has a good form factor (the one with 9 sample pads). However I wish there were simply 3 line level inputs, mixing capability with those inputs, effects etc. And potentially the ability to record or even use as a midi controller with the potentiometers and pads.
You have the ability to make a small device that fits this area of interest. No one else is making them. But yes essentiall a small usb c 3 line audio mixer/interface with some extra goodies would be IDEAL.