Having skimmed the article
a) Since the material in question was ejected by a flare, it's not obvious to me (and maybe it's obvious to others) that the ionization levels would be similar to those in the photosphere
b) Even if we assume that they are, Ne VII may be the most common, but Ne II and III are still well-represented
c) Do we have reason to believe that Ne VII does not contribute to continuum absorption?
d) There was about 6x as much oxygen as neon, making the 'neon layer' more of an 'oxygen layer.'
e) The article refers to everything but H and He as 'trace elements,' suggesting that that the layer-formerly-known-as-neon-but-possibly-better-named-as-oxygen is primarily H and He.
This (any) electric sun model is very different than the ordinary standard model. The entire atmosphere around the surface is "current carrying" plasma that is highly ionized by the electrical discharge process occurring between the surface and the heliosphere. There is no possibility of either the silicon, the neon, or the helium layers to be in "low energy" states because of the current flow traversing the plasmas.
Oxygen is selectively expelled from the plasmas and that behavior has been seen in the lab too. It's certainly present in the spectrum and certainly flows through the neon, as do many elements, particularly the lightest elements. Inside that layer however they are still "highly electrified" and stay that way (in that high energy state) until they reach the chromosphere.
Any "impurities" that introduce into the neon should certainly include oxygen IMO, and all the elements we find in solar wind data.