|Well, wiggle and movement are always good....I suppose. But if I remember my squid anatomy correctly....reinforced by cleaning and preparing squid for dinner....the tubular and elongated body of a squid is quite RIGID. There is that long, clear plastic "backbone" running its length. Also, and somewhat as a result(?) squid movement video'd looks quite straight and directional.|
This makes squid quite easy to imitate. Trolling...for example. Straight, direct movement.
So, need for/importance/value of the mid-body articuation is, in my mind, quite questionable. It certainly complicates the tying process. I'm sure the fly will work and catch fish. But is there payback for those steps and complications??