It would be nice effect to have the L3 RGBIC version to animate a rolling transition from one color to another color and stay permanently on the second color. (or turn on / off doing an animation effect)
Parameters could configure initial and ending color, direction of the transition (from LED 1 to 150 or the opposite) and speed of the transition.
Once all the LEDs are on the final color, the animation ends and the stripe remains at the final bright / color.
This can be an effect on itself or a SCENE action.
Basically instead of having the L3 permanently doing an effect, is a one time effect until all the LEDs are on and then remain static, until you turn it off (again with an animation effect).
something that allow to do these kind of effects: