Which pronunciation will you choose? If you are a prescriptive linguist from Newcastle you will presumably expect everyone to use a short a in 'castle' but someone from the south would use a long a. And which language do you have in mind when you imply that there are languages that are pronounced in the same way by all of its speakers?
Anyway, there is no Academy in charge of English so if you want to get started on spelling reform just go to it. Promote your revised spelling amongst your friends and colleagues. Or should that be: 'Promoat yor rivized speling amongst yor frends and koleegs.'?