That's all well and good for native speakers, but the problem is for non-native ones. A lingua franca should have an approachable orthography.
Nite of course. There is no English "Academy" with the absolute authority to decide what is proper English and what isn't. So I don't know that there is any ruling body to decide that, but since English is a global language, and not just the language of a couple of 2-bit countries, it's worth looking into.
Perhaps, but that would leave 2 choices, really. Either a top-down enforced form of 'standardized' (or 'standardised'!) and 'correct' written English that is created by a remote 'authority' and imposed on native speakers who currently have their own various different ways of speaking and writing, or a separate 'global' version of 'standard' English used only by non-native English speakers, and not applied to the native speakers (of any country). I can see dangers and problems inherent in following either avenue, and personally I just don't see it as being particularly necessary.
"proper" englishis usually taught in school - and yes there are minor spelling variations depending on whether American or other English is used, but apart from that, the grammatical rules are the same throughout, and the seemingly strange spellings for some words reflect their origins. numerous words in English are derived from other languages (including latin, greek, Arabic, romance languages, hindi, native american and many others), and in turn, "english" words are feeding into other languages. because it is the most widely spoken language (its the preferred second language for most non english speakers) it has to remain flexible - although the current international english language programmes do maintain some kind of easily recognised standard via IELTS etc..
Well I don't expect anything other than business as usual from the countries that have English as a native tongue (why is it spelled that way?), but other non English speaking countries that need English may end up going their own way. More people in India speak some English than in the United States. Eventually countries such as India and China, that train a lot of English speakers, may just decide to go their own way.