The short sounds associated with the letters have changed very little since Anglo Saxon times. The main reason is that this set of correspondences allows learners to use spelling pronunciation . Pronouncing all A's as ah produces understandable results. To fully restore the English alphabet, only two sounds can be associated with each vowel letter. Spelling Pronunciation presumes that people assign a particular sound to each letter.
Every letter has to be pronounced and every letter has to have an assigned sound.
There could be two sounds assinged to the vowels and to a few consonants. The word has to be pronunced without silent letters and be understood. Some words cannot be pronounced as spelled and be understood. There are words that would be easier to repronounce than respell There would be no point in respelling international spellings just to acknowledge the English mispronunciation. How about trying to improve the relationship of phonetics to spelling from the other end.