It would be excellent if we could left-click and drag out a rectangular selection box, select a whole bunch of modules, and duplicate them - preserving the signal chains between them....
also shift-left click on the header of a module to add it to the active selection.
obviously the header of each module should give some visual feedback that it is selected - maybe a color change or something.
this would be very useful for creating and editing additive setups - using many osc -> amp+adsr -> notepitch to make each 'partial' - once one partial's signal chain is set up, it would be great to able to duplicate them - additive synths require lots of partials...
btw karma is already really cool for making roll-your-own additives