Well, the permission model of Android M is something to get used to, and I failed. So this version has several fixes due to this change in Android. See Version History.
The user-defined color curve for Hue helps using “old” and “new” strips, as the old ones – they are incapable of dimming very low – can be forced to switch on later. In addition, it allows nicer colors if you like. They are not easy to define, as I interpolate H and S values of the HSL color model in a linear way. But there are test buttons everywhere.