ZSK: It seems to me that you missed my point. I was pointing out that their are significant differences in pronunciations of Loshon Kodesh between Ashkenazim, Sefardim, Teimanim, Litvaks, Chasidim as well as some additional variations.
Are you arguing that some of those are incorrect and/or that
between the varying pronunciations of Loshon Kodesh between Ashkenazim, Sefardim, Teimanim, Litvaks, Chasidim, etc. only one is correct and the rest improper and problematic for use in Tefila?