well, it's possible to make a wave with the existing FX Generator, and it isn't much work to do so!!!
The random fade in/out is also not that hard to make (depending on the number of heads,.. you have off course!) Once you have created it you can always use it later on again by importing scenes!!!
Besides that, the programming of the light show is at least as pleasant as running the show itself (for me it is!!!)
If you have everything pre-programmed, then where is the fun of it all, and could you call yourself than a light engineer?