A sequencer for the /mixer/ is terribly terribly useful. Basically like having control parameters in a tracker, but for any arbitrary input you've plugged into the mixer. And knowing TE, I would be shocked if you couldn't target the mixer params with the sequencer. (Arguably, this is part of the value prop (hahahahahaha) for modular synthesizers.)

The synthesizer is probably more 'because they can,' once the rest of the software/hardware interface is in place. It's close enough to what they've already done lots of with the pocket operators; might as well throw one in so people can prototype sounds easily.

For a portable tool you can play with on a flight or in a park or on public transit, it sounds like a fun option to have.

> how do you even use those features?

It has knobs, what more do you need to make music? The user guide if you’re curious: https://teenage.engineering/guides/tx-6