It's really a lovely-sounding synth and it hits the archetypal "classic" sweet spot. Thanks for posting!
Bingo, it really is a sweet spot synth... you can probably tell from the demos, it's not a swiss army knife or a synth that will take you into all sorts of dark or experimental territory. It is simple yet incredibly musical, has a tone that can sound very familiar if you ask it to or characterful. What it gives up in overall range of sound design possibilities, it pays back in dividends in fast-to-achieve useful sounds (useful if you like the tone that is... and I definitely do. It almost reminds me of an Alpha Juno with a bit of Moog personality added).
It really is a joy to work with and inspires music. Very much like the Juno in that respect. It’s surprisingly able to do some wackier spacey things too with some of the LFO shapes at fast speed.
The only things I feel would improve it would be a noise source, level control for the sub oscillator, the ability to add LFO depth to filter via mod wheel/aftertouch, and maybe the ability to control LFO speed on mod wheel/aftertouch.
Makes me want to give the E7 a proper go. Really kicking myself for not buying it when I saw some great deals on it a while ago. Though I know bree6 actually has some improvements, especially the chorus. Really want to see Guido revive his Zeus synth (12 voice upon which the E7 was based).
I too wouldn't mind a noise source, a stereo spread control like the E7 has, etc., but at the same time I've kind of come to terms with the notion of embracing what a synth can/can't do, and tend to just find creative workarounds or use a different instrument for everything it can't.
For example for the mod wheel options you mentioned, my work around for that is to just play the knobs instead of the keyboard wheel for filter mod dept and overall LFO speed. I think Guido might have chose Moog-style knobs because they have this very playable quality to them, and I don't think I've ever had such a tiny footprint synth like this that had such nicely spaced/size/laid out/feeling knobs. I will say the ergonomics of the placement of the module relative to the keyboard is a big reason I use it that way... the Korg Keystage I'm using it with has this little tray you can insert into the back (could be a couple of pedals, sheet music etc.) and the Bree6 module, because of its size, rests on this tray which props it up at just the perfect angle, sort of like a Minimoog panel. That particular tray isn't necessary (you can see in the Scott McAuley videos he has done something similar ergonomically placing it above his 3rd Wave). If for some reason placement of the desktop unit doesn't give you comfortable and easy reach to the knobs (or if you just don't like them), then yes I definitely agree sometimes the flexibility of modulating whatever you need with the mod wheel is nice.
Curious if you use the aftertouch mapping to these functions? Sometimes how good that is is a factor of both the controller keybed itself and the synth, but I've found the AT that the Keystage sends to various synths so far to be really nice so I use the aftertouch options on the Bree6 all the time and it can be a beautiful combination.