Powerful and easy to learn
Exactly what I've been looking for. Shader programming can be tough and time-consuming, so having a visual editor like this makes things much more pleasant.
I'd been on the fence about trying other assets like Shader Forge for a while, but since those are (or seem to be) directed mostly toward 3D games, my fear was that most of it wouldn't apply and that I'd have to waddle through a lot of tutorials that didn't apply. Shadero, on the other hand, is geared toward 2D games right out of the box, so it works really well. The learning curve is fairly low. Took about half an hour of learning on YouTube before I was experimenting on my own.