Is there any specific evidence linking the manuscript to the East Asia?
I don't think one can make the argument that "Haggler Chor" sounds like Voynichnese, because we have no idea what Voynichese sounds like, if it sounds like anything at all. If you mean "sounds like the EVA transliteration", then I'm not sure this is a good argument, while EVA does appear to make some effort to link the shape and the sound, it's unlikely l was actually meant to sound as L, g as G, h as H, etc. What is more, "Haggler" certainly doesn't look to me like plausible Voynichese.
I don't think one can make the argument that "Haggler Chor" sounds like Voynichnese, because we have no idea what Voynichese sounds like, if it sounds like anything at all. If you mean "sounds like the EVA transliteration", then I'm not sure this is a good argument, while EVA does appear to make some effort to link the shape and the sound, it's unlikely l was actually meant to sound as L, g as G, h as H, etc. What is more, "Haggler" certainly doesn't look to me like plausible Voynichese.