I know that neatness counts but one of the best ways to get wires to talk to each other is to have them neatly bundled together parallel to each other.
In theory I'd agree. Practically I don't think it's an issue. I typically bundle wires and have never had an issue. Recently I rigged my sons Sukhoi it had two rudder and two elevator leads in a 1/2" diameter tube all the way to the tail of the model, know problems, no extra goodies to make it work. Over the years I have had many different scenarios with the several wires bundled in parallel, simply has not been a problem for me. Some use twisted wire extensions which I am inclined to believe has some benefit. I have also twisted my extensions (not exactly the same as twisted wire), again no problems.