The problem is EVA is just a transcription, the 'k' 'a' 'p' etc. are just characters assigned more or less at random to each Voynich glyph. They do not pretend to represent 'real' phonemes and, even if VMS is a phonetic transcription of some language (which it might actually be, who knows) it would be an incredible coincidence if EVA happened to choose the right phonemes by sheer luck.
Ie. EVA 'shedy' - 'chedy' - 'opchedy' could have instead been transliterated 'puast' 'guast' and 'erguast', or 'klira' 'blira' 'soklira' or anything else really, so I fear that trying to build on EVA 'phonetics' is a waste of time.
(Try thinking EVA as a series of numbers rather than 'pronounceable' letters', ie. 's' = 1st symbol, 'h' = 2nd symbol, 'e' = 3rd symbol etc.. What's the phonetical 'pronunciation' of the sequence 1 2 3 4 5 (shedy)? It's clear one cannot tell, each number could represent any possible phoneme).
Ie. EVA 'shedy' - 'chedy' - 'opchedy' could have instead been transliterated 'puast' 'guast' and 'erguast', or 'klira' 'blira' 'soklira' or anything else really, so I fear that trying to build on EVA 'phonetics' is a waste of time.
(Try thinking EVA as a series of numbers rather than 'pronounceable' letters', ie. 's' = 1st symbol, 'h' = 2nd symbol, 'e' = 3rd symbol etc.. What's the phonetical 'pronunciation' of the sequence 1 2 3 4 5 (shedy)? It's clear one cannot tell, each number could represent any possible phoneme).