I developed a couple of years a M4L similar to your ARP.
- The maim difference is that I implemented a random function what generates a lot of ides very fast
- I can store the idea in a preset
- This ideas (6 maximum per preset) can be automated in the DAW
If you are interested in this idea just get in touch with me and I can give you insides how I did it and what is the added value.
I already generate a look and feel of it.
I open a new topic because random source->targets & random sound source is different to random note generation to keep it separated. Hope it is okay.
You see I really getting in love with ANA2 
