Hahahaha, that's so funny! You've listed three major things I had planned from the start and will still try to hook up.
1. proper masking (certainly includes lasso, but also all standards like rectangular and elliptical)
2. drying rate controlled
3. blowing fluids around
I love the idea of the wet spray, though, hehe, that's cool! I figured that the brush types could do that trick already, though.
Since last night I've hooked up a whole lot of things now which you should check out, for sure! I bet you're gonna like it.
I'm currently developing another brush, which is something very different. It's a noise brush. The temporary version turns out beautifully like charcoal, pffff, not my intention, but hey... why not keep it. Not sure, yet, though.
Anyway, download the current version again. I still haven't changed the version number...hmm...next round I will!
OH, but the non-linearity is there for a reason. You would be shocked to find out what linear does, haha. It's even more extreme, you know. So I'll have a closer look at it again, but it's a juggle.
AH, (one more edit), And THANK YOU, man, you're fantastic and I totally draw from your energy! Thank you!