Hi Ajax,
EPU's my single most used utility.
Nesting dial groups is a great addition.
Would a 'mirroring' capability be possible_ you know if you set up a set of master slave functions in the lHand you could auto set up the same on the right? I realise there might be tecnical issues around negative/positive dial settings.

The only bug I've ever come across is an intermittent glitch with the  figure number reset dial. Occasionally it doesn't display and if it doesn't I've learnt not to apply 'reset to one' as it then adds 'ones' all through your CR2 including to each material texture reference.