I think you've made a really nice piece of software here! I use a different program for my own avatar, but Honk was perfect for the avatar I made for my partner. Basically his is a lot more "human" than mine, so he needed more detailed lip sync to look right. (He saw one one of the SGDQ streamers using a Honk rig and got really excited!)
There are two things I would like to request/suggest/ask—
One, I think the blink animation is a bit robotic as it is now. I can't be totally sure without testing, but I think what I'm noticing is that the eyes stay closed longer than I would like, and the timing is a little bit too regular. I'd love to see the blink animate faster (and perhaps even slight randomisation to the time the eyes stay closed) and with more variance in the delay between blinks. An occasional double-blink would really help too. All of that would add up to much more naturalistic blinking, IMO :)
Two, would it be feasible to have a transparent background setting ? I assume there is some reason this isn't easily doable, or else it would already be available. But just in case, I wanted to ask. Mucking about with chroma key is so frustrating when your designs use bright cartoony colours!
Finally, is there any chance of a second option for interface colour? Don't get me wrong, I love the unapologetic use of colour and I have no time for people who think everything should be white or grey. It's just that the specific magenta/mint contrast is legit hard for me to look at in areas like the sprite config (where the magenta is the primary background colour). My eyes are pretty quirky so it may not be a big deal for anybody else, but for me it's a bit rough <XD
All that out of the way—thanks for making this tool! You've done some great work.