I was wondering how you'd adjust patch levels, so I looked through the manual. Turns out you need to press-hold the capture knob for two seconds to change the level of the capture (then save and exit). The level knob defaults to being your master output level.
I find this to be a possibly pretty annoying design flaw. IMO both patch and output level should rather be available directly, especially as the parameters are hardwired anyway (unlike on, say, the HX Stomp, which is offering various ways to adjust your patch levels).
On a positive note, I also stumbled over this:
By default, the Nano Cortex knobs adjust parameters immediately when turned. If the 'Catching Knobs Instantly' setting is disabled on the Cortex Cloud app, Nano Cortex will operate in Latching Mode, where the knobs' position must match the values indicated by the LED rings before they start adjusting parameters.
I'd say that's the best you can get out of the stupid combination of LED rings and standard pots. It obviously remains a stupid combination nonetheless. And it's getting even weirder, as they're obviously aware of the related issues (hence allowing the behaviour to be switched via the app) - so why not adress things the real way, as in using endless encoders?
And while I was in the manual, I was looking up the expression pedal options. Another at least somewhat positive thing as you can a) control multiple parameters at once and b) set the controlled range. Yeah, pretty much bog standard on most newer devices, still, as everything else seems to be implemented rather rudimentary, I didn't exactly expect it. With a little bit of fooling around, you should be able to turn a single patch into at least two pretty different sounds by the flick of a switch (or seamlessly blend between them with a pedal), such as a bone dry rhythm tone and a wet lead sound.
Also, the FX, while limited, seem to sound quite decent. Delay lacks a tap tempo option, though, IMO that's pretty bad (but it might've needed support for dual external switches, which it hasn't - IMO another downside).
What I'm really wondering about is whether they will deliver an update allowing you to use, say, an overdrive instead of the transpose FX in slot #2. IMO that'd make a whole lot of sense and should be easily doable in terms of CPU-usage.
Oh, one more thing I noticed in their deep dive video is that, while switching seems to be gapless indeed, reverb/delay trails don't seem to happen.
Guess that is as far as I want to explore this thing. Some positive bits but defenitely not enough to make me even think about grabbing one.