I like your "messy" video, it looks like an automated orchestra beiing born ! Great, it is very creative ! The vibration bit used on the violin is wonderful ! !
Yes it sounds Very reasonable !
I did not use the pulse bit, because its step frequency is faster than the oscillator at lowest frequency, but it it worth a try ofcourse..
Using the latch is also a good idea.
About the servo:
The jumpy start is unavoidable, the initialisation when the power is activated cannot be changed I think. What I ment was the fact that the internal coils of the servo turning the motor work with a strong magnetic field and the little load peaks of the current involved induce fluctuations on the power connection VCC from all the bits connected.
When for example a speaker with the MP3 player is connected in the same circuit, you can clearly hear these fluctuations as a funny but unwanted noise.
If you want to know more about this you can find detailed info in this forum thread, there is a clear video of an oscilloscope screen somewhere where you can see the noise :
As @chris101suggested, separating the load of the servo via the wireless bits is a fine solution, I hope for you that maybe in your orchestra it is no issue at all, please keep on experimenting and please show your progress to all of us. Great !