I've been messing around with his awesome package for a while and found out a major limitation to this, since this is using the unity default Gradient tool it is limited to only have 8 Keys in a Gradient. For example if you're trying to do a toon look with the Recolor effects Fill and have the gradient to have a mode of Fixed you have to be very picky about which keys you have to use, thus preventing you from mapping out all the luminosities you need.

If it's possible, could splitting up the gradient into two separate ones be done?
Other than these little issues, I'd like to thank you for sharing this graphics toolset with us, it's been awesome to use so far, great job!