Thank you for your reply.
Redundancy of letters is a phenomenon that is non-existent in most planned languages e.g. Esperanto, Toki Pona etc. With natural languages, redundancies occur. In English language for example:
The letter C could be completely substituted by S, KThe letter Q could be subtituted with KThe letter S is pronounced as S (sad), Z (as), Sh (Sure, Sugar), J (television) or silent (island)The sound z is produced mostly by S, while Z occursThe sounds Ch, Th, Dh, Sh, are commonly occuring with no specific letter to correspond with that.The letter Y, could sound like IThe double letter OO, could be U (blood), or O (door), or OO (poor)
In Greek there are six ways to give the voice of IIn Russian the theta letter was pronounced as F, only in 1918 they removed it. There are no evidence to support that it was pronounced otherwise.
In short what I am trying to say is that, writing system develop over decades and sometimes hundreds of years, it develops in different geographical areas and once a generation, gets used to writing something in a certain manner, or important texts are written or distributed it can persist, writing systems are very difficult to work in backward engineering manner, and try to find a logic to what happened exactly as the input is so complicated, multifaceted, with no apparent logic(s) at times.
OB pronunciation is a bit older than 1600 AD, there are manuscripts that are older, up to manuscripts written as Arabic in Coptic letters around the 9th & 10th century. Older texts show mixing between Delta & Daw, Wida & ha, Bashmuric dialect (written entirely in only Greek letters) used phi to denote fai. This is not to say that OB was the one and only pronunciation that was used everytime and everywhere. It just provide sufficient evidence towards its authenticity. I am relying on the PhD by Dr Emile Maher and other resources from
Coptic sounds.
I have no inclination of changing the church's pronunciation or anyone's pronunciation for what it matters. This is none of my business, the church is lead by church leaders, they decide on these matters. I guess I am concerned with providing supporting evidence for the OB pronunciation. Language revival would require a goal, motivation, proper pedagogical approach, time and money. Chaos inevitably happens if there is lack of proper planning and proper implementation, this applies to any aspect of life.
I am reciting attempts to address chaos; with respect to language reform towards OB, or other pronunciations Dr Emile Maher proposed starting with Deacon's responses as they are sung solo, then moving forward. Dr Kamal Farid Isaac, proposed a middle pronunciation which he sees as an authentic one in his rejected PhD to the Higher Institute of Coptic Studies (2009), where each unit of time (decade) one letter pronunciation is changed. I do not necessarily endorse anyway of these methods. I guess it is people's right to know exactly the history of their language. What any person does with it, or what people agree on, is a matter for public decision and organisational implementation.