Thanks for the addon!
Maybe you can get even more inspiration from addon called randomizer. I asked the developer if he is going to update it to Blender 2.8, but I didn’t get a reply for few weeks.
See Blender Market: randomizer.
yes, is another method, but I was trying to get the chance to animate the effect,
example:
(cubes and spheres are real objects, not arrays)
and see interactively the result
I was also trying to have more control groups, like “particle system” but for randomize, but for now I don’t know how… I keep trying…
thanks!