First of all, I think it is incorrect to call green circuits "Electronic". It represents not electronic, but electric technology.
Thus I suggest to rename
- Electronic circuit
- Advanced circuit
- Processing unit
- Electric circuit
- Electronic circuit
- Processing unit
Electric and Electronic sounds very similar, but anyway everyone call them green-red-blue.
Also having Electronic circuits before Electronics research is weird.
May be some technologies should require red circuits instead of green.
For example:
- Rail signals. Currently entire railroad tech branch might be researched in a row. I don't even understand why it is split into 3 techs. This new dependency will add some feeling of progression (again). Also linking Automated rail to Electronics would be nice, albeit very minor tuning.
- Combat robotics. Actually, basic Robotics tech, instead of only Construction and Logistic.
- Circuit network. It is very complex and powerful tool and, perhaps, appears too early in the game. May be it is worth splitting it in two : keep circuit wires where they are now (to make simple direct controls like tank-pump), but link combinators to red circuits (and change recipe respectively) to hide full power of circuit network behind more significant technological progression.

