Dafuq is Viz scans? then the 'Viz' scans and normal scan are contradicting each other since both mean completely different things.
Definition of Electrical field: An electric field is generated by electrically charged particles and time-varying magnetic fields
so really we are talking about on a microscopic level more than a macroscopic level (Which would be chidori Nagashi if were talking about elecctric) If you tie both scans together they actually mean the same thing because both are talking about on a small and more technical scale as opposed to this:
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Which is what i think most people are perceiving a electrical field as. some people read too many mangas.
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these flow through our body and in turn are also called electrical currents.
She can only minipulate these currents INSIDE her body
You are using the term Ying-yang in the wrong sense your mistaken. Yin relates to the persons spiritual energy and Yang relates to one's physical energy and it's necessary to utilise both of these in order to mould chakra . But since its a non elemental technique its considered Ying and yang technique. In a sense its a passive release
So you're saying that Tsunade can only manipulate electricity in her body? So I feel there is a few things you simply don't know, maybe highschool failed you, but whenever, there is electricity there is an electric field. You cannot derive from that, Tsunade can only use change her chakra into chakra on a microscopic level. She used a technique more effective for her purposes than Chidori Nagashi. She deactivated half the signals and crossed the other half.
Further insofar as Tsunade can change chakra into electricity at a whim, what makes you think that she cannot change more chakra into electricity as she sees fit. As she has tons more chakra available.
if you go and look at Kakashi lecturing Naruto about elemental recomposition, you'll see that's clearly what Tsunade did.