First, thanks for this awesome plugin, i really love it. Well recently i wanted to use it for stuff like tiles and brik walls and ran into some limitations so here are my suggestions.
1. 3D arrays (i know this could be achived be stacking multiple clone modifiers on top of each other but if you want to change some values you have to jump through the stack).
2. All random values separately for X, Y and Z (and as float type like previously suggested).
3. An offset function with the possibility to offset every nth row within an array (this could be helpfull if you want to make a brik wall in a running bond style).
that's it, thanks.